Can anyone give me any advice please?

I am constantly feeling period like pains, they make me feel like I’m going take a period even though I have already taken one. I feel the pains almost every day throughout my cycle. I am having stabbing pains in both sides of my pelvis, to the point where it’s becoming painful and making me gasp when the pain comes. I am feeling a lot of heaviness/pressure down below and now sex is beginning to become sore, when I am having sex it hurts both side of the pelvis. Can anyone think what this might be?