Been having horrible episodes while high; Please Help!

Hello, This has only happened to me a lot recently with only two really spread out occurrences in the past. Basically at a set point in time when I'm getting high testerday it was right after me and a buddy finished a blunt (very skimp), last time it was after my fourth blunt with two other homies and I. What happened is that I'll get a horrible feeling and my vision while sitting up will fade out to what I can only describe as like black and white smudging or squares and I'll have to close my eyes and put my head basically in my lap and control my breathing for a pretty long time to get out of it. If I try to push through it'll gradually gets worse and worse and I can't take the sharp pain. So I have to wait always and it sucks cause I feel like I'm fucking with my homies experiences. If you guys could please help me discover the root of this that would be amazing! Some more info is that this did happen for the first time a long while back probably over 6 months back while smoking two joints between 5 people, but then didn't happen again until like two months ago now these last two weeks it's happened both times I have smoked. I used to smoke a blunt a day when it happened for the first time but since around that time I stepped it up to several heavy seshes throughout the day for almost 6 months now (it happened once during this time too) until two and a half weeks ago I injured (need to get an MRI for more conclusive results) my ATFL and have been on ibuprofen 800 mg, I usually take one a day at a random time. I'm a big dude at 6 ft 230 and I know while I was still at my university (had to leave 2 and a half weeks ago cause of my ATFL) I had a pretty high weed tolerance so I don't think it's that Im getting too high cause each time it's happened I know I've been wayyyyyyyyyyyyy higher in a lot of other occasions. And although the IB 800 dosent really affect me much could it be fucking with my highs? Thanks for any help! It is sincerely appreciated.
 
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