Firstly, Jeremy gave you all kinds of good input on that thread. Fuck, he is one patient dude. Jeremy, if you read this, job well done. I would read his comments a few times and make sure you are implementing his advice.
Patellar tendinopathy is the bane of several trainees existences. Once it starts, it can be very difficult to resolve. However, yours is not a typical presentation. Patellar ligament (more correctly) pain normally comes on slowly and can often be present for months before it really starts getting in the way. Further, if squatting is bothering it, it is unusual that a 16 day cessation did not make it feel any better.
The first thing to do is to relax. While the patellar ligament hurts and is annoying, it is not indicative that your knee is going to fall apart, or that anything terrible is afoot. You can even squat with decent form and sometimes develop patellar ligament pain. It does not happen to most trainees, but I know a few, including myself who suffer from it.
Try this:
- Do five days of ibuprofen, as described here. See if that knocks things down a little. You are early into this, so it may be all you need to do.
- Decrease your squatting frequency to once a week. Deload as needed. See if the pain subsides.
- Consider doing box squats. These encourage a more vertical shin and can keep you out of your knees a little.
- Stretch your quads, hammies, and calves three to five times a day for at least 60 seconds at a time. Might work. Might not. Try it for two weeks.
- Foam roll, or roll on a lacrosse ball two or three times a day focusing on the quads near the knee. Foam roll before squatting.
There are some options for you to try. See how things go. This is a shitty problem, but the fact that it had such a recent onset for you means you will probably get by it.