Bactrim and taking blood

I was started on Bactrim 7 days ago. The first two days I felt fine, but the 3rd night I got cold...very cold and could not stop shaking for about two hours. My heart was racing and I was nauseated and couldn't focus. This went on for about 8 hours before going to the ER. Upon arrival I had elevated BP and pulse, but after a couple of hours it went down to normal. I saw a new doctor who said it sounded like I had a hypoglycemic attack!! I never had one of those before!! So, I'm figuring I'm getting sicker and maybe it is not from the Bactrim so I take it again and last night was another horrible night!! Racing heart, confusion, and urinating every 30 minutes. Thinking maybe I'm having another attack I get up and eat some applesauce and my husband gives me some sweet tea. I promptly threw up a few times and then we went to the computer to look for ourselves the side effects of this drug. Guess what? It causes hypoglycemia, racing heart, confusion and does something to your kidneys and makes you urinate too much and could be very dangerous!! That was it for me!! I didn't sleep the rest of the night but slept on and off during the day and felt like myself today for the first time since taking the drug. I don't know if it has done any permanent damage, but I will let everyone I know about this awful awful drug!!