How bad could I get arrested for this?

ok so this might be long im sorry. I was at a party with my fiance her brother my brother and my friends when my fiance's sisters ex boyfriend called my fiance's brother. my fiance's sisters ex and his friend were drunk and at some stupid party and decided to diss my soon to be sister in law my soon to be brother in law and my fiance. my fiance's brother was gonna head over to knock em up a bit so I went with to make sure nothing got control. when we arrived at this party their was a bunch of drunk 15-18 year olds all over the place. (m 19 and in college). well three guys came up and started to smack talk us and my fiance's brother was really close to starting a fight so I stepped in. I told those little imature punks to leave my soon to be family alone and I did it really harshly and aggresively...but peacefully. I called the ex of my fiance's sister in law a little b******. (he is really rich and spoiled rotten more than anyone I know the kid is an a**) since I was in his face he took a swing at me. I got hit in the face and lost it me and my soon to be brother in law just went ballistic I took the friend down with one punch andkicked him in his face and I tackled the other guy and punched and elbowed his face. I think I broke his nose and I KOed him he was done (a mix of the alchohol and my brutality). the other guy backed off and my fiance's brother took the other guy down and busted his lip and his arm. we left soon after becasue somone had a gun and was waiving it around. I just got home a little while ago and even though the guy through the first punch... they were all 18, I still beat the living crap out of the ex. so how screwd am I? serious answers please I dont think what I did was right but I care about my friends and most especially my family I dont like to get screwed with.