wow… sounds a lot like something i went through about a year ago.
i injured my back when i was 17, pulling 405 with bad form. although i knew good technique and virtually always had amazing technique with deadlifts, i didn’t understand at that age that training progression wasn’t a linear line upwards. i thought i was supposed to be stronger every week compared to last week, and every workout compared to the previous workout. boy was i wrong. i was also maxing out on deadlifts every time i did them. needless to say, i forced it up and really hurt my back. i felt pain shooting up and down my body and lost my vision for about 15-30 seconds.
it never felt the same after that. also, over time i could feel my back degenerating in terms of its flexibility. and over the years, avoiding uncomfortable stretched positions i began to lose flexibility in hips, hamstrings, groin, and lower back. the more i avoided simple things like bending over to tie my shoes or picking up something i dropped on the ground, the more and more my flexibility degenerated. and i simply kept plowing forward. big mistake.
fast forward to age 22. my flexility is bad, i haven’t done regular deadlifts with heavy weight in maybe a year and a half, and i’m even skipping conventional squats because that irritates my back. i couldn’t even bend forward like 6 inches! so i resorted to front squats which involve less back flexion. i’m warming up with 135 and i feel this inflammation in my back. i rack the weight and i can barely stand. i go lay down on a gym mat for like 15 minutes and decide to go home due to the pain. i go home, take a nap for a couple of hours, when i wake up and can barely make it out of bed.
the next day i couldn’t even move. i was virtually on the floor for a week. it was scary as hell. i took the same anti-inflammatories you took and did some physio and gradually began walking again and then hitting the gym again.
all the advice i can give you is to trust your physiotherapist if he/she deserves your trust, and trust your instincts in the gym. if you know you shouldn’t do a particular exercise, don’t do it.
me, i rested my back for a long time after i started recovering. i didn’t do deadlifts, rows, or any of that shit for awhile. i did chins, i monitored my back arch when benching , etc…
use your judgement, over time the rest will allow your back to recover.
here i am, about 2 years after that horrible experience and i just pulled 600 pounds from knee level . and i’m benching again with a good arch <not as good as prior to my injury, though> and hitting 315 for singles any day i want <did 325 today for 1>.
you will recover, trust your judgement and instincts, don’t do exercises that your body is afraid of, be patient, stretch out appropriately and increase your flexiblity in your hips, groin, hamstrings, and lower back, take it as slow as you feel you need to…
take it from me, you will be ok!
also, to be specific, my injury was severe compression of L5/S1, specifically on my left side. and i’ve been diagnosed with degenrative disc disease… but i’m still rocking!