ABout 2 days ago i noticed a lump on my 7 month olds head, its on the right hand side of his head about 5cm above his ear. Its quite big, around 1 1/2 times the size of a 50cent peice. I had a gentle feel and it feels soft, almost like its filled with fluid. I made an appointment with his doctor but we can't get in until Monday. I figured it might be from the way he sleeps, his head is a little moulded and wonky because he favours his left hand side when he sleeps and i thought it would be ok to wait until his appointment but Dh just got home from work and we had another look at it when DS2 woke up from his sleep and I think it might have gotten bigger so DH has taken him to emergency. I'm freaking out! I've been watching him closely and he's still happy, laughing, not drowsy, pupils ok etc etc all the things to look for with a head injury. He's just learning to pull himself up on his knees and he's had a few falls but nothing too bad and it doesn't seem like a bruise to me, its not purple or red, just skin colour and it doesn't seem to hurt when i touch it. Could it be his brain?! I don't think its a fontanelle (sp?) because its at the side of his head and i can feel both his fontanells which are closing nicely.

I feel so stupid for not insisting we get an appointment sooner, DH thought i was being silly for worrying but after he looked at it tonight he started to worry too and now i'm really freaking out.
What could it be??? I'm hoping DH will call soon to tell me what the dr's say. Hopefully he wont be waiting all night to see someone.