Painful ovulation

Hi, since yesterday I've had this pain that feels like my period is coming, it doesn't feel like my uterus is contracting but it feels like pressure all over my lower abdomen. Occasionally I feel pain in my left or right side. I got a positive opk last night, I didn't think ovulation would be so painful. I took clomid cd 5-9. I'm terrified that I'm gonna get twins, I mean id be happy but I really just want one lol. Anyone else have painful ovulation on clomid? Where did you feel that pain and what did it feel like? Did you get twins? How long should I expect this to last? It's hard to babydance when your in pain.