Gonal f and ovulation

Hi we’ve been ttc for over 8 years. We’ve done 2 cycles of ti I believe I’m anovulatory or possibly have pcos. I’ve had a hsg one of my tubes is blocked, my husband did a Semen analysis and it came back amazing. I’ve had all sorts of tests and they all came back normal. I don’t think I ovulate on my own. But I did ovulate on a round with gonal f. We’re out of money now for medically assisted fertility. I’m trying to get some answers we can afford the gonal f but cant afford 2-3 vaginal ultrasounds a cycle. Is there another way to get to ovulate with gonal f without the expensive ultrasounds? Help