Haven’t been on in a while.... school, teaching kids etc. .....So I’m almost 20 weeks preg I am…

Haven’t been on in a while.... school, teaching kids etc. .....So I’m almost 20 weeks preg I am having period like symptoms (no bleeding ) I had the Ligament pain with my last pregnancy with my son but this feels like right before your period starts I don’t have any other symptoms does anybody know what this is? Oh and this baby is extremely low in my belly don’t know if that means anything ? 🤔