Question: Weight gain esp in abdomen(after losing/keeping off 75lbs for 5+yrs), inability to lose weight despite diet/exercise, heat intolerance, lack of sweating, muscle weakness despite resistance training, strange spells(get so weak I have to lie down & within minutes I'm unable to lift or move my limbs & head due to total weakness, speaking & breathing takes effort bc muscles are so weak but I am completely alert, just feels like my body has been 100% drained of all energy sources, lasts from 15mins-1hr, food seems to help some but someone has to literally feed me during these episodes, usually have a headache after). Every 2 months I'll have a week or so where my muscles ache badly, esp the tops of arms & legs, they'll feel heavier than usual & I'm unable to lift the things I typically can. Also I now have a frequent urge to urinate, constipation with bouts of severe abdominal distention(comes on quickly & can grow for a cpl of days, sometimes so large it effects my breathing & im unable to wear my typical pants). All has gone on for years; no doctor has been able to diagnose it. My newest issue are deep horizontal dents across my fingernails(& 4 toenails), 2 dents on each nail, same width apart. I know this is a lot of info, but I believe it is all connected somehow. Please help; I'm so tired of being weak.

Thank you so much for your detailed response! :)
I am on Adderall XR 30mg once a day, have been since August 2007. I do not smoke, never have, I drink once or twice a year. No new stretch marks. I also take a digestive enzyme before meals and a daily vitamin. I don't snore, no sleep apnea but I don't sleep well. I fall asleep but wake up several times a night. I tried taking 5mg of melatonin, it kept me asleep for 3 straight hrs which was great but then I woke up & stayed awake for the rest of the night.
I am not diabetic that I know of. These episodes have been happening for several yrs. I had a lot of different things checked in 2010(thyroid, A1C for blood sugar...everything was normal). During a cpl of episodes in 2010-2011 I was able to check my blood sugar(my late husband was diabetic so I used his monitor). One time it read 82 during an episode. Another episode it read 67. Also in 2010 I went to the ER during an episode. My muscles were too limp to walk on my own, movements were slow, I looked & felt drugged, speech was slow, it felt like my body was paralyzed. That's how lifeless & heavy my muscles were... They found nothing, sent me home & suggested I see a neurologist. I saw a neurologist a cpl month's later, on physical examination he said I had weakness in my hips, neck & arms. He did bloodwork which showed CPK levels almost 20 times the norm. The retest was the same. A month later he tested me again, levels were about 5 times the norm which he said was ok since my levels had decreased. He then dismissed me as his patient. Next I tried a rheumatologist. They ran bloodwork, a sleep-deprived EEG, an MRI of my head, an EMG & eventually a muscle biopsy from my thigh. Nothing was found. I stopped pursuing answers at that point & decided to just deal with the issues & episodes on my own. That was 3 yrs ago, & they're still happening.
My periods are typically painful, can be very heavy. I started gaining weight in October 2012, started birth control in December 2012 to regulate & lighten my periods, I stayed on the BC for 3 months(it did lighten my period a LOT but my abdomen kept getting bigger during those months so I decided to stop taking the pill in hopes it was causing the abdominal weight gain). I had also become constipated, laxatives were not helping, when i had bowel movements they were very thin. My abdomen, esp the lower, constantly felt swollen & heavy so I stopped the pill at the end of the 3rd month, the following day I started bleeding a LOT(although my period had ended 4 days prior), I was soaking thru 2 super tampons an hour. This continued for 6 hrs followed by 15 hrs of soaking thru 1 super tampon an hr. A few days later I had my 1st normal size bowel movement in 3 months, 2 wks later I was 8lbs lighter & abdomen was no longer swollen. I assumed the BC was to blame for the swelling & weight gain...4 months later, the weight & swelling in my abdomen started coming back. It has stayed ever since despite diet, exercise, etc.
With my muscles, I'll have days-weeks of feeling ok, having strength, able to do my workout routine with 8 lb weights and then randomly, my muscles will start getting weak again, lasts for a week or so, then goes back to normal & so on.