Antibiotic Effects

I'll try to make this as clear as possible. I have been on Antibiotics for Acne since I was 14 years old. I am now almost 23 years old. Each winter since I was 18 years old I have had various health problems. Last year I suffered from subaccute thyroiditis. I lost 15 pounds(160 lbs to 145) and was fatigued constantly. I couldn't get out of bed on most days so I went to the Docs and it turned out I had a TSH level of .1. Most people I have read about usually gain weight however, I lost weight. I lost weight again this winter as well. During summertime, I gain the weight back and am steady around 160 lbs and my Acne is reduced significantly. Other symptoms I have suffered from are a loss of libido, respritory infections, GERD, sweaty hands and feet, teeth grinding and whitish coating on my tongue. I'm not sure if the coating is a result of candida because it does not look as severe as most of the pictures I have seen. Also, the GERD began about 2 years ago and this past fall it went away suddenly.
I believe that having been on Antibiotics as long as I have, it has had an effect on my health. I just recently got off of them and am currently doing a parasite and Bowel Cleanse program. Also, I am taking probiotics now as well. I also have changed my diet and am eating almost all meat and vegetables.
If anyone has any ideas what could be going on with me, information would be greatly appreciated. Being a college grad with a crappy job, I have no health insurance so I have to resort to these forums. Thanks!