I was the same way with my first OR clinical. I had seen plenty of stuff and I work LTC as a CNA and I thought I had a stomach of steel...NOOOOOOO!!!!
I saw two hernia repairs, a laproscopic cholecystectomy(gallbladder removal) which aren't the bloodiest messiest procedures, but the doctor with me was one of those gung-ho "come here and look at this...watch this...ewww did you see that" kind of doctors. The blood didn't bother me, the cutting didn't bother me...but while they were cauterizing blood vessels after pulling out the gallbladder I became aware of a certain unpleasant odor...and being a student I didn't ask, I just wondered...and it all of a sudden became clear to me that it was the smell of burning flesh. Just the thought of the burning flesh made me hot, kind of dizzyish, a little nauseated. I just sat down for about 2 minutes on a stool in the back (they brought one in before the surgery stating 'we know how you students get during these things') and then I felt fine. The smell itself was not sickening...just the realization of what it was...
As a nursing student or a nurse you will find that there are certain things that just get to you. My biggest issue is watching someone spit phlegm out of their mouth when it just hangs to their tongue cause its so thick. I can get phlegm off the floor, the sink, the sheets just fine but if I see the person actually hacking it up..it just makes me gag. Puke on me, poop on me, pee on me, bite me, spit at me, whatever (I told you I worked LTC) just don't spit up the phlegm while I'm standing there...ick
so in response...yes it is normal to feel that way. I'm sure you will get accumstomed to most of the things that got to you the first couple of times, but there is usually that one little something thats gonna get you every time
Good luck in your classes