Had a blood draw this morning to check my levels, and the news wasn't as good as it could have been. It's gotten low (too thick), so they're upping the Coumadin to 7.5mg three times a week, and 5mg the rest of the week.
But in good news, I've started to take advantage of the free gym here at work. Right now I'm just walking or biking for 20 minutes a day, but I hope to increase that eventually. I just have to balance it with the arthritis and pain thereof, since I can't take any anti-inflammatory drugs (like Advil) while I'm on the blood thinners.