In constant pain

St

I'm 17 weeks and I've never made it this far in any pregnancy but I didn't think it would feel like this. Don't get me wrong here I am so thankful to be pregnant again and hopefully finally get to hold my baby at the end of this but is it normal to be in constant pain? I feel like I have been hit by a bus, my entire body is sore and exhausted from cramps. My cramps always intensify at night to the point that I'm crying out in pain and I wake up feeling like I've ran a marathon. This is going on a week now and I've talked to a nurse at my doctor and she said I'm fine. I don't understand how how this pain is normal. I know I have so long to go but I just want this baby to be here.