i am on my 4th period in 8 weeks and am exhausted and feel anxious and tingly all over a little like i could pass out. I have always suffered with pms for a few days a month (and had a 28 day cycle) and i am convinced that due to my frequent periods this is why i feel so depressed, but my doctor has prescribed me anti depressants! As i had blood test in april that they saY were all normal. surely hormones can change in 6 months?