Hi Doctor I Have Some Concerns About My Pregnancy. I'm

Hi doctor I have some concerns about my pregnancy. I'm 22 weeks I have had really strong period like cramps I'll get 3-4 of them and a hour later another 3-4 of them and its been giving me back pains abs diarrhea also I have been cramping in my right leg sense ttlhis has started and not in my left any suggestions? I have tryes a warm bath drinking lots of water and have been resting for the last couple hours.