Morning Sickness Before Missed Period?

Hi everyone,

Just wondering if anyone has ever had morning sickness begin extremely early? My husband and I are trying for #2 and my period is due in 4 or 5 days. But last night I woke up with a huge wave or nausea and threw up all night. Thought it could be food poisoning or a stomach bug but no one else in the house is sick even though we all ate the same food yesterday. I want to wait until I've officially missed my period to take a test, and I don't want to get my hopes up. But I can't help but notice what's going on as wonder... (I very rarely throw up. It's been several years.) Plus I'm having twinges in my lower pubic area and my BBT had a major spike on the morning before this nausea.

Anyone ever had morning sickness begin even before their missed period? Or am I grasping at straws? Thanks!