Good to hear you're feeling better...if you have other running injuries, there is an online forum at Runner's World: Running Shoes, Marathon Training, Racing
with an injury category...you can always poke around there for advice.
I've been a runner for 5+ years now. About 3 years ago I had a similar issue with my knee. PT helped enormously, and they gave me some strengthening exercises that I still do to this day, 2 x per week. Haven't had any knee problems since! Funny, at first when I started having knee problems I was "blaming" the high impact of running...after PT I realized I just should have blaming the weakling muscles in my hips & core.
All is well now...I run ~ 30 miles a week with no problems.