Having Hypothyroid unable to conceive?

I have hypothyroid that getsonitered every six months, normal and controlled with pills. However I have been diagnosed with this since 09' after having my son. I got pregnant in Aug of 2010 September I had to have a D&C baby wasn't growing. I feel since then can't get pregnant. We hadn't been trying then but now we've been trying since Dec. 2013 and nothing...Doc suggests fertility specialist..of course can't afford! I use opk and I feel hopeless an very sad!