Baby throws up in morning

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So the last three days my 10 week old son has been throwing up after the first 2 or 3 feedings of the day. This just started and I'm not doing anything differently. It's much more than his spit up and he doesn't do it the rest of the day it seems. It's enough to get down the front of him and get on me and the couch. I'm getting concerned. He doesn't have a fever and seems fine and my mother says babies do that. Anyone else or any advice? Should I call the doctor? I get anxious feeding him now.