Hi and welcome to HCM!
Thanks for posting your query here.
If the urine test is negative there are no chances of being pregnant. The symptoms your are saying about seems to be GI problem -Dyspepsia-where there is fault with the digestion. This is causing bloating, constipation
and lower abdominal pain
. The lower abdominal pain is because of constipation. It could be relieved by taking laxatives in the night. Cremaffin, dulcolax or lactulose
can be used. Bloating of the stomach can be relieved by taking omeprazole
one tablet daily. If the problem persists please visit a gastro for further management.
Regarding your periods-how irregular is not mentioned by you. A low Hb value-anaemia- may cause irregularity in the periods. This can be corrected by any oral iron preparations. One capsule a day will increase the blood Hb significantly.
Hope this is helpful to you