I've had a constant tension for 3-4 days even when lying down doing no…

I've had a constant tension for 3-4 days even when lying down doing nothing. It is occasionally accompanied by tingling sensations in my lower abdomen, and they intensify when I try to turn over or stand up, it's really painful. The tension was present before during the third trimester, now it has become more frequent and there are tingling sensations. Headache is present.