Fatigue or extreme weakness. Bp was low.

Before 6 months I had depression nd my psychiatristhe suggested taking flunil 20 my tablet.But when I took the 5ablet within half an hour I started sweating and became so much that I fell on my bed.but I was conscious.when consulted the doctor my BP WAS low.mostly 90/70.then I consumed lots ofor fluid.I recovered.again in the evening the same symptoms re-occurred. Then it subsided after few minutes when i took lots of fluid with sigar nd salt.I was taken to casualty in a hospital.at that time my BP WAS normal.The doctor considered it to be due to acidity. After this I became normal .but the same symptoms re-occurred after three weeks when I was in a party.After this third attack I have not become normal.continously I am suffering from seviour weakness.In the month of November, December and February my BP became low.Now my BP is normal.I have shortness of breadth and varicose. lam suffering from extreme weakNess. I can't do my teaching job.I am also a hypothyroid patient.