Birth Control

Okay so I went to get the Nexplanon on 10/01/18 I bled for three weeks then November my ob put me on birth control pills to control the bleeding. I finished my November pack still bleeding longer than 7 days which is my normal length. Finished my December pills as well I bleed for 11 days then it stopped then at the end of December my period came . I decided to take the Nexplanon out on 01/30/2019 while I’m still bleeding ( it’s been about 2 weeks now) now it’s three days after I took it out and still I’m bleeding it will come for two hours and then stop for the rest of the day then come back! My question is when can I start ttc? I heard ppl getting pregnant a week after removal before their next period but I’m still on my period so will I ovulate after I’m done bleeding? Is this withdrawal bleeding because I’m having a bit of cramps also last night I had unprotected sex because I thought I was done bleeding just to wake up and see a little bit of blood I’m so confused right now any answers will help