Psoas

I seem to have pulled my psoas. I blame janu shirshasana. Okay, I blame my own bad alignment, or pushing too hard or something, but I'm pretty sure I did it in Janu Shirshasana. I've done it before, and I think it wakes up an old birth-of-my-son injury, so as I'm hobbling around I'm flashing back on the labor process, and that time I got this same injury in an Ashtanga class and it took a month to heal. I'm being pretty careful and cautious, but the muscles are so deep it really gets under my skin (literally) I'm finding myself irritable and tired.