Hi Jay,
For me the serenity prayer helps – part of that is about accepting the things we can not change – one of the things none of us can change is the past.
The best advice when you are in a hole is to stop digging – dont let that 100k in losses turn into 150k…….200k etc it is a progressive addiction.
You want to stop gambling right now which is great. Now what actions can you take while you feel like that? Get yourself banned from where ever it is you usually gamble? Put other barries in place? Start using support – like regularly posting here, getting to Gambers Anonymous meetings, counselling etc.
Next time those urges return you will already have some bariers in place, already be using the support that will help you not place that next first bet.
Keep posting.