Feeling horrible!

Im currently cd12 and 5 days out from my last letrozole dose. And im super nauseous, i was a little bit nauseous yesterday too. I also woke up with a sore throat today to, took some daytime medication and it went away.

According to my clearblue digital ovulation test i enter my high fertility days yesterday cd 11. So im guessing im in my fertile window currently.

Is nausea a common symptom in the fertile window period?