baby kicking cervix? first time mama.

I'm 18+4 and just started to feel my baby kick my cervix (assuming from research). Kind of tmi, but it causes like an "air popping" feeling in my vagina lol. Is this considered normal? I've also read some comments saying it could be due to a short cervix which now worries me. I'll have my next appointment this week so I'll be sure to mention it. Anyone else felt their baby kick their cervix? How did it feel for you? Please share!