Advice?

Ive been with my boyfriend for 6 months and we have spoken about trying for a baby. 
I have had really bad pelvic and stomach pain for 2 to 3 years now. I finally had surgery in November to look for endometriosis, which came back negative. Now im being tested for celiac and chrones and have a hospital appointment in May. Im on 3 lots of strong pain killers and im scared they will affect my chances of getting pregnant. But at the same time if i stop taking them i will be crying and keeling over in pain (which i do while on the painkillers) 
I have no idea what to do or how to speak to a doctor about this.