Pneumococcal jab is compulsory. since it is compulsory, i think most parents will prefer their babies to get jabbed at the same time. It is VERY normal for baby to cry and wail during jabs, maybe this is the 1st jab your son is taking thus you will feel heartache. Even up till now, when dear son cry after being jabbed, we still feel heartache too, but no choice right?
I'm sure the hospital has prescribed your baby paracemetol for his fever. Just continue to feed him the dosage and frequency stated until his fever fully subsided. Usually for such fever from vaccinations, will not last more than 3 days.