Haven’t had a period since December 2017

Jazmeka

I have sex 3-4 times a week out of 7 days. I got my nexplanon removed Jan. 24 , still no periods, light cramping , little spotting pink and brown. No nausea , tingling breast. I’ve been to the doctor twice both test negative (blood & urine). Idk what else to do idk when I’m ovulating or anything.. we’ve been TTC since I got off birth control