Why 😭😭

I’m almost 24wks along with a little boy, my whole pregnancy so far I’ve been really constipated, my doctor told me to take one colace pill every night to help keep things regular, with also drinking more water which I’ve been doing. Today I’ve had awful stomach pains which were making me worry but they also kinda felt like gas pains, for the past three hours I’ve have pure liquid bowel movements and my stomach has been in so much pain. I haven’t gone to the bathroom like this in forever. I feel like I can’t leave the house.. this can’t be normal. I want to cry. Once I go my stomach feels better but when it’s about to come again I’m in awful pain.