Need help!! 😫

Anon • Kaitykatt.xx
Me and my boyfriend were having unprotected sex. 
I've got implanon implant in my arm and I've had it for 2-3 weeks if not more. 
He nearly came inside me. Like. Started to cum then pull out. He said "I had 1 dick twitch inside you but it didn't feel like anything came out" 
When he pulled out he came in his hands but we don't know if he did cum inside me a little bit or not. I think I'm a few days after my fertility period in my cycle too if that helps. Should I be worried? 😫😫