Nausea Before Missed Period?

Hi Gals!

So I am 9DPO and 9 days past getting my IUI. I randomly had a bit of nausea this morning while brushing my teeth. It felt just like it did during my first pregnancy. The nausea lasted until early afternoon and then subsided. Then it came back early in the evening. This is very out of the norm for me and it doesn’t feel like an illness. I have had some cramping on and off since yesterday. Has anyone else experienced something similar to this and tested positive? I took two test tonight because I have been so baffled by this, but they were both negative.

TIA!