rusted wheel can't move on

I had some high hopes for the NY Mini 10k. I really like this race, it's women only and has a very unique course in NYC, starting on Central Park West out of the park. The first mile is fast and flat. It also has a huge pro field and a great history. There's a really cool video about it here. After missing my 10k PR by 2 seconds right before Boston, I was targeting this race. The last few weeks I've done specific speed work on what's the 3rd mile of this course as it historically gives me trouble. And there's something else that historically gives me trouble: my foot.
It's felt fine. I ran low milage going into Boston, I've run lower milage since, adding swimming and biking. After a hill workout this week, it really flared up. Frustrating as I've been doing everything I'm suppose to be doing to take care of it. There is a theory that perhaps swimming and biking is aggravating something. While it doesn't hurt while doing either of those things, perhaps it's just manifesting when I run. I'm going to PT on Monday, I want to get this taken care of and if that means no running for a while, fine.
Anyway, back to the race. Since this is all women, I get a nice start up in the front (blue bib as those of us in NY call it, since first corals have blue bibs). Historically, I run the first mile way too fast. I found my pal Megan to start with. We had talked during the week about trying to keep that first mile under control. And we did. 7:33. The pace felt great, I thought it was a good way to start. Then I just got this terrible pain in my foot. I felt like I was altering my gait and it just plain old hurt. I decided to ease up. I ran a 7:44 2nd mile and decided to phone it in. Stopped to stretch (miles 3, 4, and 5 were in the 9s) and finished with an 8:28 mile 6. Total time 53:27. Meh.
After I was very frustrated. My friend Sharon asked if I was frustrated because of the pain or because I didn't run well. It's the pain. I don't really care that I didn't PR. It's a 10k. Not something I've ever specifically trained for and not like a marathon that if you blow it, you can't try again for months. If I was totally healthy, I could do it again next week no biggie. I can easily (well, sometimes) just let the race go if it's not going my way, chalk it up to a throw away. Not to mention I can look back to a time when this was my race pace and now, my HR wasn't even up for the last 5 miles.
So PT Monday and we'll see where we go from here. The next big just running race I'm planning on isn't until Sept. I do have 2 triathlons before that, one isn't until the end of Aug so I have time to just cross train, I know my running will come back quickly if I have to be on the shelf a bit. Plus, I have this totally beautiful new bike that I'm really enjoying getting to know.
And finally, Megan's smart start today really paid off. She ran 43:40 (7:02 pace!!!!) for a big PR. Girl, you're inching ever closer to that sub 7 pace. I hope I'm there when you do it.