Spacing out my baby's shots?

I'm completely pro vaccinations but after my baby's last round of shots it seemed as thought she was sick for over a week. She stopped rolling, stopped babbling, it was so scary. She hasn't babbled since. She's supposed to get her 6 month shots tomorrow and I'm terrified she's going to regress even more. My two year old was just diagnosed with autism and I'm hyper vigalent with my daughter. Am I crazy for wanting to space them out? Opinions please.