There's really nothing to be ashamed of, you were under influence and obviously you did not know what you were doing.. Or at least not doing a willful sin.. I can relate as I too have been in many situations like you have, struggling with Anxiety Disorders as well as using Alcohol as a coping mechanism, i have many times put myself in embarrasing situations, I have foughts, flirted even talks nasty things and did some very disgusting things during my episodes. But by the grace of God, I know am cleansed by the Blood of Christ.. its been awhile since the last time I fell into the trap, temptations are still there but I am daily asking God for renewed strength to overcome my weakness. MY weakness is quite Dark, a very shady one. I believe even as Christians we are not removed from the Devil's crosshair.. we become a more prominent target for him, the idea is to make people or yourself do things that keeps you away from God.
But remember, God is not suprised at all, in fact he knows before you even sinned.. But what he wants from you is to repent, the remorse you feel is a sign of conviction already..
So do not feel ashamed, just pray and know the truth, the word of God says it all,
1 John 1:9 - If we confess our sins, he is faithful and just and will forgive us our sins and purify us from all unrighteousness.
Do not have to run from him.. He is a loving father and is always ready to receive you back, God has forgiven you before you even asks..
Will pray for you, and do pray for me too.. God Bless.. In Jesus Name.