St. John's wort and nexplanon

Jessie
So...last month I was in a very deep depression and took st. John's wort for a few weeks thinking it only effected the pill...I have nexplanon and apparently it can effect that to. Last month I bled/spotted for 3 weeks ....it's been a month now and I spotted very lightly last week but nothing else...I'm so paranoid that I could be pregnant because of the st John's wort...I'm a bit bloated and my back hurts but that happens often...no other things like sore boobs and my period is not regular so missing one is pretty normal...am I just paranoid? I've been paranoid before and am semi convinced that I can't get pregnant anyway uhg