well i lost 13 in a row when i first got back to gold this season, if that makes you feel any better. Then i tilted so fucking hard i dropped back into silver all to silver 3 then summoned all my strength to get up to gold 3 59 lp my highest this season. I just barely got my win rate back to 50% :)
Also, remember that if you are bronze there is a shitload about the game that you don't even know or think about and your decision making and mechanics are bad! When you're in low elo you need to really recognize how bad you are and think about what you are doing wrong and how you can fix it! So there is sooooo much you can improve in your game play to help you climb.
Watch your replays and watch streams of people who main your champs/roles, read guides and try to analyze whether you are taking the right runes/masteries into the game for your matchup and if what you are building is right for the particular game.
Assess whether you are backing at good times, roaming at good times, warding in good spots at good times, whether you should be pushing or freezing a lane, and much more... improve yourself and u will climb.