Margaret,
I can't really think of much to take with you. I suppose stretchy pants for comfort after surgery. If you're able to or have access to decent pain medication you might take that with you as well. As much as I've heard about the lax pharmacies in Mexico I was surprised at the crappy pain meds they give you. I'm still experiencing pain in my left shoulder due to gas buildup, but I've been reading some posts here today and some people have recommended a heating pad, so that may help too. I'm planning to get one for myself today! I'd love to keep in touch with you regarding your surgery, but I just joined the forum today and am not able to send personal messages yet and can't give my e-mail out online. If you're able to send a PM, drop me a line!
Christy