I Had A Incident That Happened Last Evening Where I

I had a incident that happened last evening where I felt dizzy and thought I had leaned over to catch myself on the wall but when I came to, I had actually dropped to my knees and started shaking but I was on all four. My husband said it happened really quick but it wasn't a seizure. I wasn't drooling at the mouth or shaking profusely around the floor. But it did feel like a blackout because I don't know how I fell to my knees or remember my husband jumping out his seat to where I was at the time I came to