Baby's First Needles

Last night Noah had to go to the dr. for his first set of needles (immunizations). Everything was going smoothly. He was getting weighed in (a whopping 12 lbs, 1 oz, he's my little piggy boy) and is 22.5 inches long. He gained 2.5 lbs and grew an inch since last time which was a month ago. The dr. poked and proded him and then it was time. He went to get the dreaded needles. I was totally fine with it. Phil who hates needles left.
Noah of course cried both pricks. Then I picked him up when all was said and done. He wimpered for a bit. Then we went to check if grandpa was at the dr. yet. Grandpa put the poor little guy to sleep. It was so cute.
When we got home, Noah was fine. Just a little clingy and wanted to be held all the time. I went off to bed and left Phil and Noah downstairs.
I fell asleep but then all of a sudden was awoken by Noah screaming/crying at the top of his lungs. It was a cry I had never heard before. After a while I went downstairs to see if I could help. Phil said he was sleeping in his swing when all of a sudden he was turning his head side to side and started screaming. Poor little guy. We have no idea what was the matter with him. We think he was dreaming or it was an after effect of the needle? Any suggestions or ideas about what was wrong? I had to change his diaper and he freaked out and was shaking, that's how bad he was crying/screaming. Then the little guy fell asleep in my arms. I went back to bed and he was fine for the rest of the night. He usually eats every 3 hours on the button with occasionally waiting 4 or 5 hours once a day. Last night he went from 10pm until 4am without waking up or eating (minus his little freak out at 11pm). Of course you would think I slept cause he didn't wake up for his 2:30am feeding, but I didn't cause I kept wondering "when is he going to eat". Maybe (fingers crossed) this is a sign he will go longer at night without eating.

Today my little guy is happy as anything (his normal self again). Last night wasn't too bad but I don't like having to go through it every two months for his needles. Oh well, you gotta do what you gotta do.