Constipated and cramps ??

Jeannette • 38 year old single mother. Have two kids a boy and a girl at 18 & 16 years old. I've got great support with this baby ❤️
I'm 10 + 1 and I'm so constipated today that it feels like I'm going to burst.. I'm eating healthy and lots of rye, whole grain and drink water.. And it's so bad that it feels like it pressing on my uterus... And making everything cramp... And I'm not sure if it's my bowl or uterus... I know my uterus is growing a lot and I also get the ligaments stretching pain. But I'm just over thinking it now because this is just horrible... 
Anyone else in this situation???