Earliest you've felt sick before a BFP?

With my first and my second pregnancies, I didn't start to feel sick until after I had my BFP. That was at around 8 weeks the first time and at around 6 weeks the second time. It is definitely possible to feel nauseous a lot earlier than that though, and frankly I am too at the moment though am only 7 DPO myself today, so I'm hoping too! Good luck. x