Were you playing a bunch of games the same day and losing? Losing streaks usually last longer if you keep playing more & more games while losing without a break. Tilt is real and even if you not mad your confidence will be shaken and you will make more mistakes. It has happened to me a lot. Best thing to do is take a break, go back to the basics and figure out what role/champs you were playing when you were winning and go back to them.
The other thing could be your true elo is lower than bronze 2 and you got on a lucky winning streak but now you dropping back down to your actual elo. Either way best thing to do is take a break and think about what you could do in those games to increase your chances in winning. Then basically play, practice, improve. Don't get too stressed out as climbing the ladder is annoying as hell. Don't let it get you down or then it wins. You have to persevere.
My story is pretty lame so a better story of how you can see tilt being real is with challenger player Anniebot. That dude always plays Annie and a lot of games a day. I have checked his past record in the past say on a Monday (I was really into playing Annie last season) and he would be like challenger rank 190. Then I would like like 7-10 days later and he would have hardly any lp in Master. Then you look a couple more weeks later and he would be back in challenger.
The grind is tough but don't let tilt make it harder. If i lose two ranked games in a row I stop for awhile (unless playing with friends then sometimes I will keep playing). It has helped me a lot and helped avoid those large 8-10 game losing streaks.
