4-5dpo and cramps-worried

[Sombra]

I think I ovulated about 4/5 days ago. This evening, I have developed some on again off again cramping. I barely get cramps with AF, so to get them this soon after ovulation is unheard of for me. They are also different than AF cramps...feel more like a pulled muscle, but comes and goes. I'm wondering if anyone else has experienced this and if I should be worried.

I know that at 4/5 DPO it is too early for this to be pregnancy related, which is why I'm worried.