2 month shots?!

My baby has his 2 month shots today and I am a wreck! It's only 5am and his shots aren't even until 10... idk why I'm so nervous, what can I do to make him feel better. I got infant Tylenol, should I give that after the shots? Also the dosage information on the back so confuses me. I plan to nurse him directly after to comfort, anyone out here who has already got the 2 month shots for their baby have advice?