Feeling nauseous

Georgia

We are TTC and for the last week or so I’ve been feeling nauseous quite a bit. I’ve done a test but it was a BFN. However I’m on my first day of my fertile week and I’ve taken an ovulation test which has come back negative with no second line at all😒.

And yesterday I went out to walk my dog and all I could smell was dog poo....but there was none in sight?

Can anyone help me with what to do?