Help.....any ideas what is going on????

Here is the run down of symptoms since Sept 06:
Nausea
Abdonimal pain
Trouble sleeping
Trouble staying asleep for more than 4 hours
Extreme moodiness
Fits of rage and crying over nothing
Lack of interest in hobbies
Weight gain of a 1lb/week
Fatigue
No period after stopping my BC for nearly three months (finally got it after doc gave me Provera)

More recent symptoms:
More rapid weight gain (10-12lbs in last months despite workouts 6 days/week and diet of 1700-2000 calories)
Abdominal bloating
More pronounced fatigue
Grooginess
Fuzzy thinking
Uncreased irraibility
Weight gain since sept '06 45lbs never had prior weight issues

Tests:
Blood test: neg pregnancy
Urine: neg UTI
Abdominal ultrasound: normal
Pelvic ultrasound: normal
Thyroid: normal as of Jul 06

Current medications:
NONE

Past medications: (stopped usage in Jul '07)
Tetracycline (acne) 250mg
Zoloft 100mg (took for 4 months with little to no improvement)
Apri
Amitriptyln 50mg (to aid sleep

I am very frustrated with docs. I am normally a very laid back energetic 24year old. It take a lot for me to even go to the doc.......but i feel like he doesn't believe me. All he wants to do is put me back on the pill, which I refuse because I have had trouble with it before and now that I am married I don't find it as essential as before. The other lecture I got fromhim was the weight gaon is because I am eating too much. I really wanted to scream that I am not an idiot. I understand how that all works. I workout 60min cadio/weights 6x/week. and for the last 7 week I have been really watching what I eat.
ANY IDEAS???

could you have food poisining or a pregnency, nd the side effects of the medications