Extremely worried , please help .

First time since we found out I'm oregnant me and my husband had sex last night( doggy style). 9 weeks now . I felt some pain in the low right abdominal but he was trying to be gentle so it was ok . Today I still have pain but it's really light . I don't even feel it most of the time sometimes i feel strechy pain in the right side . It's Sunday , I can only go to the ER or urgent care where they don't have ultrasound specialists on Sunday's . Should I worry ? Pain is not sharp but when I walk fast I might feel it .