My children missed their next injection when it was due. Just resume their course as soon as possible. My child had quite a severe reaction to his first triple antigen injections. Yes, but it may be necessary to change to the one without the pertussis vaccine. Your doctor should have reported the reaction to the health authorities, who would review the severity of the reaction.
Most children can continue with their normal course.
My children are breast fed. Breast milk contains some antibodies, but not to the diseases the immunisation covers. A very small number of children can still get the disease, but generally in a very mild form. I got asthma after I was vaccinated. There is no evidence that asthma is caused by immunisation.