Propranolol and weed = oncoming depression?

I woke up around 1030 this morning (its almost 9pm now) I smoke grass everyday and have done for the last year and half, so I woke up and sparked a joint, my mum left the house at 12pm so I sparked up another J.

At this stage im about a [7]. I found some propranolol (10mg tablet) in my kitchen and I read somewhere that its a beta blocker (don't really know what that means) and that it can help with anxiety, iv been stressed with real life lately and had nothing to do today so I took the tablet at 1pm.

From 1pm-4pm I smoked another 3 Joints (just now realising I should probably mention I mean spliffs [tobacco+weed] im in uk so we just say joints, anyways) I realise that iv been lying on my bed and haven't moved or had much of a thought process at all, I just went zombie mode and cant remember anything iv done in the last few hours, nothing crazy just lay here quite depressed all day. (not a usual thing for me)

im still quite sad and don't know why, I ran out of weed a few hours ago so now I just feel empty, iv been processing my life and feeling very nostalgic about childhood. I walked to the shops about 30mins ago and felt very disconnected from everything around me.

Will this feeling continue?? because I have work tomorrow and im not in the best state of mind...

EDIT: i also got a very intense ringing in my ears (what i imagine tinnitus to be like) at around 2pm that didn't stop for at least an hour, im not sure what this is related to but it seemed like valuable info