Contact Lenses Help me Please :S?

Okay so I got my first pair of contacts yesterday (Trial Pair) and yesterday I didnt have much problem other than the occasional discomfort. Well today in the morning i put them in and had to wear them for 6 hours today like my doctor told me. At first I was alright just a little uncomfortable then an hour later or so my eyes would get REALLY watery and irritated continously so i took them out and put them back in to see if that was the problem and my eyes felt fine but then they kept getting irritated, and watery, and starting stinging and this time my eyes kinda got a little red. So i kept them in thinking its probably my eyes getting used to contacts and I held through the pain for hours. Well hours passed and now it was 30 mins before i could take them off and I couldnt handle it no more they were stinging bad and both of my eyes were getting foggy/blurry so i took them off and now my eyes are bloodshot and my right eye is very uncomfortable and i have this red mark around my Iris on my right eye. Is this normal for wearing contacts the first time? or am I allergic to them? I'm worried it might be an infection cause my eyes were getting very watery and irritated when i had them on. :S