Please see your doc.Intrusive and disturbing thoughts can be symptoms of various depressive and anxiety disorders. For me, even speaking with my doc was a great relief. It can't do any harm to see your doc and may really help you.
Since quitting I've also tried mindfulness,positive thinking etc which is helping but a very gradual process and much depends on external factors to an extent and how you are.You've been through some tough times recently and I hope things improve for you.good on you for not drinking though