Talked to my Dr

So I called my OB today because I'm past the point of annoyed and we are doing a blood pregnancy test and if that's negative then we are gonna try to figure out why my cycle keeps stopping they're talking about maybe starting a medication to help trigger ovulation anyone have any experience with this. Should I be nervous about it. My last two kids were all made without intervention. My period just disappeared I'm only 25 so I don't know what is going on. I'm so nervous what if I have to get shots. What if I end up with triplets Or sextuplets I think that's a thing what if those last 2 years with no cycle gave me uterus cancer and now my family is gonna be forever incomplete am I over thinking this?