Runners -- Anyone ever have a foot stress fracture?

I think I may have one. I have been running since February. I have been gradually increasing my distance over the past 6 months (first did the C25K program over 12 weeks), not going crazy or running more than 3 days/week. In that time period, I also lost about 40 of the 50 total pounds that I've lost. In the last 2-3 weeks, I've been getting a sore foot after running, so I was resting it until it was pain-free before running again (typically 2 days or so). About 2 weeks ago, when I went for my 10k run, I started getting some pain around the 5k mark, so stupid me, I kind of changed my gait instead of stopping. By the 8k mark, my knee was also in so much pain I was forced to stop. I could barely walk/hobble the 2k that I was away from home. But that pain resolved after rest for 2 or so days. I ran a 10k race this past Sunday, and my foot has been in fairly excruciating pain with swelling since then. I was waiting to see if it was going to resolved, but I'm guessing I need to see a doc about it. Anyone have any similar experiences? And what was the outcome? I've been staying off my foot completely and icing it multiple times a day, but it's still swollen.