Panic attacks on E, worsened by THC

[Superglue]

SWIM's two last rolls (about a year ago) went straight to hell, possibly because of THC.

SWIM was doing a lot of psychedelics at the time (mostly shrooms a bit too often, and a lot of hash/pot).

On he's first bad roll, SWIM had the best roll of his entire life, until he went up to go to the bathroom right after smoking a joint. SWIM was just finished taking a piss when SWIM's pure euphoria went over to pure, dark panic for two seconds. This completely ruinded SWIM's roll and he fell asleep on a dark amphetamine-like roll.

On the next roll, about a month + after the first described roll, SWIM first took one pill on Friday night and fell asleep before the effects really kicked in. On the day after, SWIM took two pretty good pills (same batch) in the afternoon (SWIM is 6'8" btw) and had a good roll for the first hour or so. Then SWIM had a mild version of the last panic attac, which again ruined his roll, but not to the same extent. Bad crowd, location made it impossible to come back up, and the roll changed into a slightly speedy and psychedelic roll (like a difficult mushroom trip). Then SWIM went home to sleep it off, but SWIM decided to make the dumbest decision of his entire life; smoke a joint to sleep more easily. This produced SWIM's most unpleasant and horrifying experience to date, where he was sure that he was about to lose his mind.

The following weekend, SWIM got REALLY drunk, then REALLY stoned at an afterparty, then went home and ate some fresh Cubensis mushrooms, which felt good for the first hour or so, then went over and into a 20-hour-long panic attack (not insanely uncomfortable like his previous experience). It felt like SWIM's brain had shut down the flow of seratonin for that period, and the world seemed like a cold, dead. Those 24 hours triggered random panic attacks-flashback style, which resembled the anxiety issues SWIM had experienced as a kid after being subscribed an allergy medicine that SWIM didn't react well to. Since then, SWIM hasn't done any other drugs than THC about once a month and alcohol, and the panic attacks has decreased to a level where they're not bothering SWIM anymore.

Any thoughts on what happened to SWIM? Has SWIY experienced anything like this before?

Would it be safe for SWIM to try E again? SWIM has no interest of doing any other psychedelics ever again, but it still quite intrigued by E.

Thanks (first post)