HELP! Please

Kaitlyn
I have an excruciating pain in my upper pelvic region on the left side. It's sporadic and only lasts for a few seconds each time it happens. It's been happening in the evening/night and this is the second day.
I'm currently 8 days late for my period. I took several tests, all BFN. I was blaming it on my period starting but it's worse than any period pain I've felt.
Yes I know, go to the hospital. But my husband is at work with the car. I'll get there but I'm just wondering if this has happened to anyone else and what it was?