What Causes Severe Pain In The Right Knee?

Hello -- about a month ago, the onset of severe right knee pain began. Dr., I found that to be odd because my pain is primarily in my Lumbar and Iliac region. Until recently, I have not experienced pain other than that pain associated with DDD. Nonetheless, the knee pain is a sharp, stabbing pain brought on while attempting to stand/walk. I am overweight/obese (5 8 / 209 lbs), 58 yrs old, history of restaurant employment (which required me to be on my feet ~12 hrs/day). Multiple incidents of falls (due to using roller blades when they were en vogue: 1990 s LoL Ouch) + High impact jogging/running (to keep weight down) + 22 yrs. mixed/combined martial arts (including TaeKwonDo/Aikido/Jujitsu). Further, as mentioned above, I have severe DDD w/heavy remodeling on L2-L5 & curiously also found in C-spine. Along with all of that, & to address my acute right knee pain I did go to ER. Xray s show that I have no cartilage...whatsoever, on my right knee. ROM is limited. The ER MD highly suspects a partial tear on the lateral right knee ligament. Due to DDD I am seeing a pain management MD. To manage the level 8 to 9 pain daily from DDD & other (soft tissue, etc) pain associated with DDD, I am Rx d 15mg Morphine / 3x daily + 100mg Gabapentin 3x/day & 2mg Tizanadine @ bedtime. Incidentally, the combination of meds are effective. So, when pain medication abates (eg break thru pain) somewhat -- the knee pain is the 1st mega-pain sensation to emerge until next scheduled dose is in effect. I am now seeking advice & counsel from an online and unknown resource because the Pain Management MD has still not given me a direct answer or even a sufficient guess as to the diagnosis of my knee and the medical protocol to employ to correct it or live with it. Because I am now experiencing extreme right knee pain, along with edema & NOW, AN UNUSUAL BULGE/LUMP/MASS/BUMP on the right side of my knee--seemingly seated just on top of the injured ligament. As I mention, I did see an ER doctor who did confirm that I am experiencing effects from a torn (perhaps not completely torn, yet) ligament. The Pain Management MD has an insufficient bedside manner and has seemingly ignored my knee issue. I will /I am seeking alternate Pain Management personnel at this time. In the meanwhile, this bulge, bump, lump or mass is troubling. In fact, during that short period of time when I do experience break-thru pain, it is because a strangling or tightly squeezing sensation overtakes my knee area. The pain from this is troubling. For over 7 generations, those who share the paternal bloodline in our family have had Factor V / blood clotting issues. Due to this new squeezing sensation in my right knee (the tissue found behind the knee vs the structure of the knee) I felt a bit of a panic or fear: “Could this be a blood clot?” I took two regular Bayer aspirin this AM as a precaution. Thank you for tolerating my over explanation of this issue. Sir? What is this lump / bulge on my right knee???? With gratitude, I will await your response.