Help ladies!

Hey ladies. I am a heathy 22 year old & my husband and I are TTC. I have very irregular periods and currently have not had one for over 2 & 1/2 months, it worries me to not ovulate & since all tests I've take come up negative. I've heard there are lots of prescribed meds that help with ovulation. . I have an Ob/GYN apt next month & would like to ask you guys for some help on what questions I should ask & what are some prescriptions that could help with ovulation in order to conceive.