Help, pregnancy pains too bad?

I am 32 weeks pregnant now. I have been getting really bad pains around mt rib cage and I am constipated. I can feel the baby moving but I am scared that because the pains are really bad sometimes and I am scared to force myself to go toilet because I am scared I am might be adding pressure on the baby. I have tried drinking prune juice and I am drinking plenty of water and ornage juice but nothing seems to help. Someone told me to eat spicy food but if I do that then the heart burns will not leave me alone. This is my first baby and I want my baby to healthy and safe. Please can someone help me or advise on what to do. Any help or advise welcome.