Synthroid and ibs

hello everyone
i am a full time college student and I believe that i have some side effects from synthroid. As i was reading everyones blog i notice that some people feel the same way that i do. At times i feel that i'm normal but if something upsetting happens i get really tired, depress, and I have a never time concentrating at school and home. My body hurts all the time. especially my joints and i feel that i don't want to do anything. I have about a year left until i graduate and its the going to be hard. I cry sometimes for no reason. help! i'm going to talk to my doctor but if any body else feels the same way please reply.