Hello, Indeed, persistent contractions with/without pain must be taken care of. It is common for some amount of pain to be perceived prior to and during the period of implantation, but not later. I would ask you to contact your consultant immediately and get proper advice. Meanwhile, please take absolute bed rest, avoid all strenuous activity including sexual intercourse; have adequate liquids and healthy diet. Please have a sonogram, preferably trans-vaginal to see the viability. Hope this helps.