My 8 week old baby boy vomited 2ce since yesterday night. It was not spit up.  He vomited all the milk that was given and it came through his nose aswell. He is cranky of late. He poops once in 4 days since last 3 weeks and his poop is very hard and once had a tiny speck of blood in it. Is all this something to be worried about? Should I take him to a hospital? There is no fever. Please help. We give him formula for 2 feeds since I take antidepressants and shouldn't feed him for 4 hours.