How affective is nexplanon?

K

I had it since I was 5 weeks pp and I’m now 10 weeks pp. I haven’t had sex yet because my husband had been away but he comes back tomorrow😏 Should we use a back up method too? We never did while I was in the pill and never had a problem. I guess it just feels weird not taking something everyday and it still being effective.

The midwife as my doctor said she’s never seen someone come in pregnant while on nexplanon but has with an iud. I feel like I’m jinxed now..