and I've been feeling menstrual type cramping.. but nothing timeable or anything. Should I call?

Goblin Gallup 5k 10/30/11 - 36:46
Turkey Trot 5k 11/24/11 - 35:14
Festival of Lights 5k 12/31/11 - 33:13
Love the Run You're With 5k 2/13/12 - 31:58
Backyard Burn 5 miler 3/11/12 - 1:08:42
Cherry Blossom 10 Miler 4/1/12 - 1:58:22
Wine Country HF 6/2/12 - TBD
Spartan Race 8/25/12 - TBD
Re: Advice: my back hurts like a b!tch...
Goblin Gallup 5k 10/30/11 - 36:46
Turkey Trot 5k 11/24/11 - 35:14
Festival of Lights 5k 12/31/11 - 33:13
Love the Run You're With 5k 2/13/12 - 31:58
Backyard Burn 5 miler 3/11/12 - 1:08:42
Cherry Blossom 10 Miler 4/1/12 - 1:58:22
Wine Country HF 6/2/12 - TBD
Spartan Race 8/25/12 - TBD
Ditto---I posted about this exact thing happening to me Friday night/Saturday all day. Eye-watering, nothing made me comfortable, etc. Then, by Saturday night, it had gone away.
I was actually sad it didn't turn into something...but hoping it at least meant I was dilating..or something. Didn't want that excruciating pain for nothing. Good luck!