19 weeks 3 days pregnant help

Ay

I started feeling and seeing baby move on the day I turned 19 weeks. I’m so happy feeling it and i love the feeling. It feels like a single bubble and nudging. I’m a little worried as some days I feel it in my cervix? Like in my vagina. It’s like a bubble feeling same as the movements and I’m worried. Is this normal? It doesn’t hurt and doesn’t feel uncomfortable I’m just worried, is this normal and what is it?