Only sick one day of the week?!

Mia
I am a second time mommy and with my son I didn't have any morning sickness or nausea at all. With this pregnancy I am usually okay with no symptoms, except on Fridays. For some reason I always start off the day with nausea and some throwing up. But only on Fridays!!! How weird is that? Is anyone else experiencing sickness only on certain days?