Low bp, Diziness and Soft stool. Down.

2 weeks ago.. I needed to go to the loo after every meal... So the doc prescribed Metrogyl 300 and Rifagut 200 thrice a day for 3 days. Then I stopped going after every meal but the stool was soft and not at all solid. I also started getting lightheaded and my bp was 84/56 on the first day.. so the doc prescribed Electral thrice a day and Omez D and Zanocin D.. for the last 7 days.. I have finished my course of medicines but yet I am dizzy through the day and when my lightheadednessis worse .. my bp is on the lower side ( 99/70) But I am also a little lightheaded when my bp is more normal. Very confused. Blood sugar levels seem normal. Attaching my BLOOD REPORT. Also have history of IBS in the family. But I have no pain or cramps or acidity in my stomach. Following a very light bland diet and having electral and buttermilk. VITAMIN D IS 33 and B12 is 249 I also feel more lightheaded when I look up or down.