Can some one get pregnant when they are on nexplanon and or after getting depo first and nexplanon second ?

I had the depoprevera shot since I was 17 then 20-21 I got the nexplanon and had it for three years now in counting I get it out in December and I’m tired on how i feel like cause it causes pregnancy symptoms and makes you scared and it sucks .

I just want to know how long I have to wait till the birthcontrol is out of my system to get pregnant or if I can even get pregnant?🤔