So my little guy got his two month shots yesterday, and was a trooper getting them done. He fell asleep for about 2 hours and then woke up screaming like crazy. I have been giving him tylenol every 5-6 hours to helps with the pain. But he whimpers in his sleep, screams when he wakes up, I try to nurse him back to sleep, and the cycle repeats. He has only been up for an hour last night at bath time, and hasn't had any bm since before our 9am appointment.. How long does the fussiness / discomfort last?