Ginger, we decided to NOT vax at all, after doing a ton of research. We basically decided that, in our opinion, the risk associated w/ catching any of the diseases was less than the risks associated w/ vaxing! Educate yourself on the actual seriousness of each disease (e.g. mumps is not that serious for girls, mildly worrying for boys) so you can understand the situation fully. I would explain to your ped your concerns about having multiple vaxes at once, and ask for them to be spaced out. Any caring ped should be able to rationally discuss that w/ you! Good luck!