I had swelling, too. I think the progesterone irritates the delicate mucus membranes, so you swell. I didn't use Medrol after my xfer, so I swelled shut, pretty much. Appealing, I know, but thing of what your hoo-haa has been through...especially if you had an egg retrieval procedure. Sheesh. Anyway, I'm a month past all that and it's very much long, long gone by now. But that first week after I stopped the Crinone was...interesting. To say the least.