what are my options, having found out may have ligament and joint issues.. ?

I busted my ass for almost 2 years, dropped over 60lbs, slimmed down over 8 inchs, and packed on about 15lbs of muscle.. in order to enlist, this last March.. went thru waiver after waiver, for age and NREMT Medic Verification.. due to the Covid Craziness, we never had any In Person Drills, for a few months, and just had our first one 2 weekends ago.. I am still, over 10 days later, with pain pills and therapy, having crazy pain in the knees and ankles, causing them to go "weak" and "give out".. I have fallen like 5 times, at home and at work.. going to Doctors and trying to figure it out, but.. the speculation is, that I destroyed my joints over the 2 years, and didn't really notice till now.. it sounds stupid, and silly that I didn't feel something wrong, but.. I am freaking out, that after all this work, I may be discharged or kicked out, because I can't make it thru training.. or, worse, that it is made to look like I lied, to enlist.. please, be constructive and try not to make me feel like complete shit, I feel worthless as is.. I just need to know my opinions..