Spotting

I am exactly 16 weeks today, I’ve been doing everything in my normal routine, besides not sleeping very well and always being hungry I’ve had absolutely no cramping since the first couple weeks of my pregnancy, I went to the bathroom this morning and there was a little bit of red spotting and then it didn’t happen again. I had implantation bleeding, but other than that no spotting. I’m kind of anxious but it’s not enough to call and I have no cramps or explanation other than possible cervix irritation, stress, or a little bit of both. I have all my normal pregnancy symptoms that haven’t gone away, so I’m just a little worried, this is my first pregnancy.