My Ranked Games

I was for awhile a very good adc player and climbed all the way from silver to platinum this season and was playing really well with my positioning and pretty much everything I was doing well. One day I had a bad day in ranked lost quite a bit of games and lost Plat 4 I was kinda upset but it wasnt uncommon everyone has bad days. Then I just keep losing over and over again I was even losing to matchups I should not have lost in. After awhile my mental state was kinda shitty and I just thought the game was over before it even started I dont really know what to do at this point I have dropped to gold and show still no sign of improvement. I would really like help trying to fix my mental state and gameplay and become as good as I once was I would really appreciate peoples help to try to fix what I am doing