Intense pain

Bonnie

I’m currently 37 weeks pregnant and having constant intense pains along my upper stomach and lower/mid back. The pains in my pelvic area come and go. I’ve been super dizzy but didn’t think much of it due to thinking baby is just pressing on a nerve. I tried to check his heartbeat due to now fetal movement this morning via home heartbeat Doppler and couldn’t find one but thought oh he’s just super low and went on about my day. Then these pains started and it’s the worst pain I have felt in my life. I called my doctor and they said the pain is normal and that it was pregnancy but should I be worried, as it’s been going on for constantly 45 minutes so far. I know that he was low and measuring about 2 weeks ahead but surely he wouldn’t come this early. Any suggestions???