Anyone ttc and a ovarian cancer survivor?? :(

I have been ttc for 3 1/2 years now. Had a rare ovarian cancer and have had such a hard time ttc. With the irregular periods from 28-50 days apart. It's just so hard on my husband and I. We have been told by plenty of doctors we can still have kids and everything down there seems great since I get regular checkups every 3 months. I'm just so depressed it will never happen ? any suggestions or helping tips/ stories?  I'm starting to feel hopeless. I just turned 30 last month and feel like time for me is running out with all my health issues.  T.I.A.