Need a doctor's opinion/guidance please?

I lost my teaching job recently due to our city and county schools merging so I will not have insurance until I begin the new school year in the fall with a private school, so I can not go to the doctor just yet, but would like to describe some symptoms in hopes to get a general idea of what might be wrong with me...over the last year I have begun eating healthy and exercising daily...I've actually become a fitness guru, I am at the gym everyday, twice a day, a typical day consists of biking 15-20 miles, swimming 50-80 laps, lifting weights, walking 2-4 miles...yet I can not lose a pound...I am 5'4", 142 lbs and want to weigh around 130-135. My stomach is bloated all the time, the minute I eat anything it swells up, and often my pants suddenly won't fit. I have actually lost about 15 lbs already since January (I gained a lot over the holidays), I did that by eating well and working my tail off, and my upper body looks great-toned and lean, but from the waist down, I look huge/swollen. I haven't had a period in about 6 months. But now no matter what I do I can not lose weight, I have tried changing up my workout routine to get out of what I thought was a plateau, nothing helped. Can anyone please advise me?? Oh, I have had my thyroid checked extensively, it's not that. :(