Pcos and hypothyroidism

So I was diagnosed with pcos when I was 19( I’m 30 now) and my weight has been the biggest struggle ever! My family doctor tested my thyroid a few years ago and said it was a little low but not enough for meds. About a year ago I started a job that keeps me extremely active all day long but didn’t lose a single pound! Should I ask my Gyno to test my thyroid? Would he even test it? Does anyone know any supplements I could take for it if they still won’t give me meds?