Car Donations in California

I donated blood the other day and i was perfectly fine during the donation. They had me sit down for 10 minutes and eat and drink something. I felt great! I got in my car and I felt 100% fine. I was pulling out of the parking lot and suddenly got EXTREMLEY faint. I knew i was going to pass out because I’ve passed out before. I pulled into another parking lot, parked my car, and tried my best to call my boyfriend so he knew where i was. My fingers were too weak to push the keys. I suddenly started sweating profusely, i opened my car door and without warning, threw up all over the parking lot. Then i got faint again. So i sat on the curb, i couldn’t stand up, i suddenly had diharrea, and my mom had to come pick me up and her and my brother had to help me get in the car. I was breathing really heavy. This lasted for about 45 minutes. Is this normal? I’m concerned. I’m wondering if i’m pregnant now too, I hear you get really sick if you donate blood when you are pregnant.