off Nexplanon and TTC

Boymom • First time mom of baby boy #1
So I've been off nexplanon only three weeks and am TTC. 
My question is #1.  How long after removal did it take for your period to return? Was is regular?
#2. Did anyone conceive directly after nexplanon removal so they never got their period?
It's been over 3 weeks for me, so I'm either expecting AF, BFP or the worst possibility my cycle is totally bonkers right now so no way to tell when AF will ever come.
Thanks!