How long were your babies fussy after vaccines?

Sarah

My poor 2 month old boy is still obviously uncomfortable. He's been fussy and has very little appetite since his shots on friday. His doctor had us come in because he didn't have a wet diaper for over 9 hours on Saturday, but he finally had a wet diaper there. His doctor said his symptoms should get better after the first 36 hours, but I'm wondering if other mamas have a more realistic timeframe I should know about?