Lanaross - yes he does have a pacifier! In the beginning before the reflux issue arrived, we used to do the E.A.S.Y method, which meant Eating was followed by Activity, which was then followed by Sleeping. It worked really well at the time because he never associated feeding with sleeping, but it meant that as soon as we did have sleep problems, the pacifier was the only thing I could give him. If he actually uses it it does help his reflux, but he usually spits it out after 10 mins.
Thanks Zooma - I've been on kellymom loads to try and work out what's going on. He pretty much has the symptoms of GERD that they list there, so sadly doesn't tell me anything new, as I already do everything it suggests. You're right, it is a great resource though

Also, someone else recommended probiotics to me, so perhaps that's something I should try.
Momofmisters - the doctor told me (no idea how accurate this is though) that it if was a cow's milk intolerance, that his symptoms wouldn't have been so strong when he was exclusively BF. Mainly because I am pretty much dairy free myself, so 1. there was no cow's milk in my body, and 2. the lactose in my milk would've been very low. As I say though, doctors say all sorts, so I'm not sure how accurate it is. I thought about trying nutrimigen, but I'm a bit reluctant to switch him again to yet another formula. It could be a great idea, or it could be confusing his body when I try out all these new things.
Littleone2010 - I haven't tried colief but of course have heard of it. I had previously tried infacol and gripe water with no luck, but that was before we realised it was reflux. Do you think it's worth trying for reflux/constipation? I just thought as I had tried similar things, there was no point me spending money on something unlikely to work. I don't know really :S
In the last few days I have put him back on cow & gate comfort formula and bf him during the night, and occasionally during the day when he will actually feed. For example he fed all through the night last night, every 1.5-2 hours, yet from 5am this morning until 6pm this evening, he had 5 feeds. The two formula feeds totaled only 2.5oz and then he had 3 really short breast feeds. That's f*ck all for a baby almost 11 weeks old in over a 12 hour period, it scares me so much!
I think the next step is to try probiotics. I reckon I might try and thicken milk with carobel instead of rice cereal, as I have heard that the rice can cause more digestive problems in the long term if given before 6 months. x