Is pull out okay on Nexplanon?

I got the Nexplanon and a month +1 week after I had it implanted I had sex for the first time in months. We got into the haste of it as we'd been in different countries for three months and didn't have a condom.

I know pull out is stupid but we did. That was the first week of August. I was already a week late for my period by the time I did that, and now haven't gotten my period at all since a few days after it was implanted.

I know irregular bleeding is normal I just want to make sure it was okay.... I use condoms now.

My doc said the Nexplanon is one of the most effective. Just wanted to see what y'all think