Slight knee pain for about 4 months now HELP

Did they do a MRI because my injury didn’t come up in an X-ray?

You need to get your X-ray and other doctor records  and go see a different orthopedic doctor.  You probably need an MRI to determine what is wrong with your knee.  X-rays do not show many injuries to the knee. It took forever to find a doctor who knew what was wrong with my knee.

You've gone to two doctors...but have you seen a SPORTS orthopedic surgeon?  They are usually in groups what work for your local college and/or pro teams.  You might want to seek one out who has lots of experience helping basketball players.  The pounding (and damage) your knees take could lead to conditions better diagnosed by someone who has seen hundreds...thousands...of basketball knees.

The x-ray will only show if there is any structural damage to the knee...it will not show soft tissue damage.  However, an examination consisting of moving, twisting and flexing the knee helps a doctor rule out what could be the problem.  FINDING the exact cause is many times more art than science, hence the recommendation to a sports, and particularly, a basketball ortho.  My wife goes to a group that handles all the TCU sports teams here in Fort Worth.

You may be on the right track with your thinking.  My wife, due to her brain surgery and two strokes leaving her with right side leg weakness, has fallen many times over the past 8 years.  This has left her knees pretty banged up.  Cortisone shots a year ago helped temporarily.  Now, she was convinced that something was really wrong inside her knees.  X-rays showed no structural damage.  The PA did her exam and ruled out all the major issues (ACL, MCL, meniscus, etc.)...then the doc came in...repeated some twists and then pressed his finger down right above her kneecap.  When we scraped her off the ceiling, he said that her problem was an inflamed quad tendon at the point where it was attached right above her knee.  (Who would have even thought of that???  How did he know EXACTLY where to press his finger down???)  Nothing wrong IN the knees but just above it.  Gave her cortisone shots (near but not IN the tendon...not a good idea), ordered her to baby the knee and take OTC NSAIDs for 10 days.  The final command was to start exercising her quads...starting very slowly...to rebuild her strength which had been depleted over the years (she's 69).

So...  I'd go see a good sports ortho and have THE EXPERT (the doc with the "magic finger" give you the "once over".  DO NOT LEAVE without a definitive diagnosis.  Do what he/she says and you should be back to normal in no time.  IMHO, I would suggest that you stop playing BBall until you've seen the ortho.  You have to know what this is; you don't want to do any more damage, even if that is a remote possibility.  Play it safe...