Here's the thing about the injections treatments - it's take a while for them to take effect, but when they do, it's not unusual to feel pretty good. During that time, you'll be at the greatest risk of seriously hurting yourself beyond coming back to a healthy starting point.
Don't be over confident and rush things. You'll recover nicely, you'll be back in shape to progress slowly, and your patience will be rewarded with a great quality of life now, and beyond. Just be patient.
I would like to add this - somehow you're not getting the kind of coaching that'll assist you in enjoying this game and at the same time progressing your ability(s). From your posting, I read a young man who is willing to discipline himself by asking questions (no small feat for someone your age) trying to improve your athletic abilities, and steer yourself towards a better horizon(s). All of what I just mentioned is worth praise and I admire your willingness to literally - stick it out.
So, with all that said, up to this point you're doing great - don't crash and burn by rushing things and toss away all your patience and hard work. You'll be very glad you did.