Hopefully my lesson can help someone else from making the same mistake. But I also found that knee pain is something that most runners complain about at some point. After doing some research, I've found some common causes that all have pretty simple fixes.
First common cause of knee pain is called: Runner's Knee or Chondromalacia of the patella. This is pain around and sometimes behind the knee cap. It is one of the most common causes of knee pain amongst runners. "The pain often feels worst when running downhill or walking down stairs, and the knee is often stiff and sore after sitting down for long periods. You might hear a crunching or clicking sound when you bend or extend your knee." Luckily, there is a way to manage this type of pain.
This is an easily treatable injury with a little patience. First, relieve the pain by icing your knees immediately after running. You can use commercially available cold packs or simply put a wet towel in the freezer before you run. Wrap the cold packs around each knee for about fifteen minutes to bring down the swelling. Take an anti-inflammatory like ibuprofen or aspirin after running, too, but only with food and never before running. Before bed, put heating pads or warm wet towels on your knees for half an hour. Stabilize your feet. Make sure you have the right kind of shoes for your foot type (review our tips on shoe shopping). Consider buying a commercially made foot support in the footcare section of your drug store. If, in combination with thigh-strengthening exercises, the foot supports are not enough to get rid of the injury, see a podiatrist about whether you might need orthotics.I think this is what I have because one of the causes, besides pushing yourself too much, is running on a road with banked edges, meaning the road slopes down at the sides for water run off. This makes sense why I never had this problem with I would run on sidewalks.
Two other main causes of knee pain are Iliotibial Band Syndrome and Baker's Cyst. You can read about them, just click on their links.
Hopefully, none of you are being as stupid as I am and are gradually running farther and faster. Happily, with the knowledge I've gained, I know how to prevent such injuries from occuring and I know to manage them as well.
Source: Cool Running
Comment time: Anyone have knee problems when running? Or any other injuries?