As both a pediatric nurse and mother to 2 young boys, I am a strong promoter of vaccinating your children.
Overall, the more research you do, the more information you will find to support both sides of the argument. My encouragement to you is to do some solid researching - especially noting the sources (what credentials to the authors of the studies have? Did they study a large population sampling, or just a small sector to support their own hypothesis?).
Again, as a nurse in Chicago's Children's Hospital, I have cared for several infants (too young to get the vaccine yet) and some older children (who did not get vaccinated) struggle to take a breath and turn blue with the effects of pertussis. It is not pretty! This is just one example of the potential effects of not vaccinating our children - not only are our own children at risk, but they run the risk of infecting other innocent children (especially newborn infants too young to receive vaccines yet).
Vaccines can be a little scary, yes! There are a lot of stories out there! Eventhough I had given vaccinations to children as a nurse, when it came to my own children I still did the research again - and came to the conclusion that it was in my children's best interest to have them vaccinated.
You have to be comfortable with your decision as your child's parent. So, do the research and talk with your doctor. If you are concerned about giving multiple shots at one time, most doctors will work with that and spread it out a little. Just keep the lines of communication open!
Good luck researching!
~H.