I tried a 5mg THC edible last week (new user) and I lost my short term memory for about 50 hours. It was hell because I could still remember some things but my visual memory was 0, so it was like I was always coming out of a dark cloud that's 15 seconds behind me, but perceiving now in full clarity. It really messed with my perception of time. I wonder how many times I thought: "what's going on... ok you lost your short term memory... but now is so clear... but it won't be soon... how long has this been happening... " I cried 40 hours in because I didn't know if it would ever come back. Luckily it did and I'm here a week later with hopefully little scars.