I completely get it, I too have taken Propranolol and they work very well. I am now at a point where I only need them as and when (which thankfully, Isn't very often). I felt exactly the same as you, no rhyme or reason.
It will get better, let the medication do its thing, it will make you feel...
OMG - We must be twins.. I suffer exactly this... Convince myself I have done something horrendous even though I know I would never do it... Beer Fear is the worst but I can't stop my nights out!
Propanolol also helps me!