23 weeks, back pain and cramping

I feel silly for posting to you guys about the tiniest things! So I apologize for pestering you! (Especially when I have an appointment Wednesday where I could ask this question!)
The past day or so I have felt my baby kick lower, almost like he's kicking my cervix. So I think he is sitting a little bit lower, but I'm wondering if this could be causing mild (super mild like menstrual cramps) cramping and back pain. 
Also... This is a super silly question, but him kicking/punching my cervix won't affect it right? Ha!