Hi doctor, this year I ve been hanging very irregular periods, I ve missed me period before for 3 months and it came back for almost 3 weeks and it was really heavy causing me to have very low iron not to mention I wasn t sexually active. The last time I got my period was July 23rd and I still haven t got it, on AUgust 2nd I engaged in sexual activity, a week after I took to pregnancy test and went to the clinic and the test were all negative. I still didn t get my period. Some symptoms I face on a daily bases are, nausea without puking, period cramping, back pain, I get irritated and bloating in my lower abdominal. I m not too sure what I should do at this point