Anovulation pcos under active thyroid

I have pcos but I have a period every month never missed one and I have a under active thyroid but I take my tablet for that everyday and they say once you take your tablet your Thyroid will be back to normal but I worry that I mite not be able to have a baby when I’m older with my pcos I’m only young but I got told if I have a period every month with pcos that you are ovulating and you should be able to have kids and that anovulation is really rear you only have anovulation if your periods are a bit irregular or irregular but mine are heavy the first 2 days but that’s it is that true because I’m worried ?