I found the pressure like a towel wrapped tight around my head was to do with unresolved sadness. I have difficulty grieving. What helps me is
1. do the right thing. don't pick up the first drink. be kind to myself and others. excerise, rest, eat properly. don't do anything bad to myself or others.
2. communicate. here, in therapy.
in time, at some point, I grieve. Slowly I learn to do it and the pressure goes.
It takes time but right living, thinking and patient awareness works.