Girls, a question about prickling in the area of the uterus. I'm 7 wee…

Girls, a question about prickling in the area of the uterus. I'm 7 weeks by obstetric dating, the doctor says the embryo is about 5–6 weeks already. Today these strange prickling sensations in the lower abdomen started. While I'm lying down everything is fine; as soon as I need to go to the bathroom (sorry for the frankness) to pee a little, they start again; I lie down in bed and everything is fine again. I'm taking Duphaston and Magne B6.