DD is 12 weeks, had second round of jabs last week. Was a bit fussy after and slept less during night (had been doing 5-6 hours, went back to 2-3 hours at a strech.) Last night back to 6 hours and now quite sleepy today. EBF, will feed for 10-20 min and fall asleep on boob, still sort of sucking but not swallowing, IYSIM. Had a bit of cluster feeding last night. When she's awake she's smiling and bright but not like my girl to bee so tired! Should I be concerned? She doesn't feel warm and has normal amoutn of wet and soiled nappies.