TTC 3mths

Hi ladies! So I recently had a LEEP procedure (Loop Electrosurgical Excision Procedure) done on my cervix back in April of this year. I also got my mirena taken out the same day that I've had in for 5yrs. The doctor said I shouldn't have a problem getting pregnant. My bf & I have been TTC for 3mths now & it just hadn't happened. I've been following my ovulation schedule via the app but I tested today & got a BFN 😔 AF is supposed to come on the 1st. I don't know if I'm too anxious or just not "doing it right." Also my menstrual tends to be irregular but I make sure to adjust my days on the app to make sure I know when I'm ovulating. Any suggestions or advice? I'm ready to have baby #2 😩