Sicky baby. How much sick is normal?

So my baby will be 11 weeks on Sunday and from about 3 weeks old he’s been very sicky. It used to be for about half hour after feeds but now it just seems all the time.

Straight after his bottle he normally brings milk back up and then as time goes on it turns into a cottage cheese consistency and then it’s almost just like water with specs of white in it. It doesn’t bother him. He’s still smiling whilst it’s rolling out his mouth lol but I just wanted to know if anyone else’s baby is just a generally sicky baby or if I should be concerned? He’s been gaining weight fine and the doctor just shrugged it off and said it’s reflux but he’s not in any pain at all. She gave him some gaviacon which worked a little bit made him constipated so I stopped using it.