Thyroid Cancer

This post is going to be all over the place. I have brain fogging problems and I'm just all over the place... all the time anyways. So... I'm 21 years old. I'm going to be 22 in June. I was diagnosed with thyroid cancer in August... last year. I had a total thyroidectomy done in August as well and I had radiation treatment done in December... That being said it never really hit me that I have cancer. I don't know if it's how my mind is coping with it or if I'm in denial. I got married last month in January as well... Surprisingly. I also noticed I'm gaining weight again. I don't know what to do or how to cope. How am I supposed to lose weight? Should I see a therapist or psychiatrist or something about my lack of emotions towards my illness? Is it odd?