fainting spell

I have an irregular heartbeat and low blood pressure. Sometimes when not enough oxygen reaches my brain, I faint. This happened yesterday. I usually have about two seconds notice that this is going to happen. I try to set down and put my head between my knees. My husband finds me on the floor, making strange noises. It's very unnerving for him, poor guy. This does not happen often, maybe once or twice a year at the most, and fortunately it only happens at home. When I had good insurance, I always went to the hospital and had a pretty thorough check-up. Now my insurance is not so great and I'm afraid they might cancel me so I don't bother going to the doctor. I buy jewelry instead!