Implant concerns

I’ve been on the implant for a month now I was on it for a year but it got moved so had to have a new one fitted!

With my last one I was missing a lot of periods, this one I’ve just come on my period. I’ve had sex with my boyfriend the weekend, I’m just worried that I’ll miss my next period in May if I do is this normal?

Has anyone else experienced where one month they’re on their period and the next month they’re not! I just don’t want to have a baby just yet x

Thanks Zoe