Wind or vomiting in my baby's sleep?!

[LEd1984]

My son is 7 weeks old and has been bottle feed since week two. He generally is a windy baby, his burps are quite forceful and recently he has begun to bring back up a bit of milk following the burps. He also brings up milk when he hiccups, of which, are quite frequent. Recently he has been windy in his sleep, when I have gone to check on him the bed sheet under him is soaked, its in his hair and also on the floor. It doesn't seem to bother him as he carries on sleeping. Is this anything for me to be worrying about or should I see the GP?

[Sephy]

Bumping, as my 3 wo DD has similar issues though a bit less extreme. No idea on advice from me I'm afraid...