Girls, please help me. I just had my first pregnancy and everything wa…

Girls, please help me. I just had my first pregnancy and everything was different. That's why I don't understand. Closer to bedtime, my belly started hurting from the area of the pubic bone and below, like during periods but slightly stronger. The pain is getting worse, even in the heat it throws me off, my heart beats faster and feels like it's constricting in the rectum (sorry). Then it stops. Now I noticed that between these pains, my lower back hurts. I started counting them because they aren't regular and the duration of pain varies. So I don't know what it is, maybe someone has experienced this? In my first pregnancy, everything was clear, it started gradually and