It’s only been a few days for me but I’ve been having similar symptoms, headaches and stomache aches. I think that (at least for me) these are anxiety symptoms related to debt and keeping up with the obligation of gambling- hopefully they go away as we get further and further away from the addictive spiral. Everyone’s experience seems to be slightly different though.
I really feel what you mean about the relief from not having to constantly check mobile gambling apps- you tie so much of your hopes and fears into them. The relief is a reminder that doing this wasn’t benefiting our lives in any way.
Hang in there, you’re doing great!