I Have A Thyroid Condition And Have Been Off My

I have a thyroid condition and have been off my medicine for a year and some months now and I've noticed an extreme decrease in my sex drive , I do not get horny nor do I desire to have sex . When I do have sex it's like nothing , I don't feel aroused , help !!!! I'm only 21 I'm suppose to be enjoying sex and this is depressing . I'm not sure what my levels are but I believe I'm hyper .