I Have Missed About A 1 1/2 Of My Levothyroxine

I have missed about a 1 1/2 of my levothyroxine and recently went to a trampoline exercise gym. I have not been extremely active for a while as I am sure this did not help. I do not feel as though I over exerted myself. However, after 45 min of on/off jumping I sat down and felt like I was going to vomit and passed out. It took a while to come around and was very tired when I did. Since then I checked my TSH level and it was 7.2. Myquestion is could missing the doses affected my bodies abiltiy to regulate my temp and I simply overheated, or could it be that I am just out of shape? Thanks