Ectopic Pregnancy?

Went to clinic to have a scan and there's nothing showing. I only found out last week. I don't want kids and my contraceptive has failed me. They told me to look out for ectopic symptoms and come back in two weeks. I dont know if im just paranoid but i feel like i have the achiness of flu focussed on my pelvis and legs. I feel like I need to stay in bed, and moving hurts. I dont have any other flu symptoms and haven't been around amyone ill. Should I go to A&E; like they told me or call a doctor for advice? I'm the worst for not seeing a medical professional. It feels like I'm having a very heavy period but worse. No bleeding or shoulder pain.