8 week old excessive sleeping?

Hello all!

My baby is 8 weeks old & yesterday and today he has been sleeping NON STOP! He also hasn’t really been keeping down his meals which is somewhat normal for him but it seemed to have been getting better until yesterday. He slept so much yesterday during the day and night as well as today. He has missed several feedings & refuses to wake up when I try to manually wake him up. He saw his dr for his 2 month check up today & got his shots so that could be the reason he was tired tonight but it doesn’t explain last night. Dr said he might be getting sick which I hope is not the case. Is anyone else’s baby doing anything similar? I’m an anxious mom lol 😆 thanks in advance!!!!!