Advice on not feeling baby kicks

Hi, I am 21 weeks & 3 days with my second. Lately, I always feel the baby kicking around as he is super active. The last few days I’ve been feeling less and less of it. Today I only felt a few kicks total. The last few days I’ve been having stomach pains, so all of this is making me start to worry a little. Is this normal or has anyone had a similar situation? I am calling my OB when they open just to seek their advice as well. Sometimes I’m a little embarrassed because I suffer from anxiety and mild hypochondria so I feel like I’m always calling and asking my poor doctor questions 😩 it’s currently 2:30 am where I live and I can’t stop thinking about it.

Hoping someone’s been through something similar so I can stop worrying.

Thank you in advance 💕