What are these cramps?

Kat

i had two embryos transferred in a frozen <a href="https://glowing.com/glow-fertility-program">IVF</a> cycle on 7th February. for two days after the transfer on and off I had very dull cramps down below almost like period cramps but very mild. that lasted for two days and then nothing until yesterday. today and yesterday I have had stronger cramps like AF or period cramps. Just wondering what these cramps are as they aren't as mild as they were after the transfer so wondering if it is my period coming but surely two days of cramps and my period should be here by now?! not due to test until Sunday 18th Feb. period due Thursday or Friday. help!!

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