Failed glucose test

I went in to take my glucose test today and everything went as normal as could be until they did the blood work to check at the end of the test. I got flushed, light headed and a little dizzy. I was able to get up and walk but I felt really bad for the rest of the day. I get home do little stuff around the house then lay down for a bit. Anytime I laird down my head would pound and I would get nauseous. I get up around 4:30-ish and threw up, took a shower brushed my teeth and now have heartburn like no other. Well I got a call from my dr saying I failed my glucose test and I have to come back in tomorrow to re-test. What is everyone’s experience with a failed test?!