32, IUI three days ago, cramps, no Fertility drugs

Yashaira
Hello:
I had an IUI three days ago and I have period-like cramps since. 
The day I had the insemination I got the ovulation pain and the next day ew cm was gone. bbt indicates ovulation on same day (spiked the day after). 
I'm having cramps. My concern isn't whether I'm pregnant, but that something went wrong. Like an infection or something. 
This is my first IUI ever. Anyone else have an IUI with cramps days after?

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