TTC after stopping birth control.. Help!

Long story.. Blessed with 2 amazing daughter's (13 &11). I had my IUD removed in January. I had my IUD for 10 years, it worked great! I started birth control immediately after having my IUD removed. I finished my last pack of bc on March 31st (completed the entire pack). Since 3/31 I haven't experienced any withdrawal bleeding or a period. Since I've been on forms of bc for a LONG time I'm really nervous of the side effects. Never had a period while I had my IUD & only light spotting while on bc. I have a Dr. appt scheduled for Thursday, but curious if anyone else has experienced similar circumstances? If so, how long did it take you conceive? **I've had headaches & sore breasts for the past few days. Taken a million pregnancy tests all BFN. Appreciate all input!! Thank you!