Same here. He used to sleep reasonably well at night, either sleep though or up once maybe twice. Since the start of the year he has been up a minimum of three times a night, sometimes more. He feeds and usually goes straight back to sleep although lately he has started waking when I put him back in the cot. I think that it is because I put him into bed with me when he wakes up early in the morning and he wants to be in there all the time. He is winning too, because after I have been up three times already and it is only 2am I give in and put him in our bed. I know it is perpetuating the problem but I can't stay awake to feed and then settle him.

I have also wondered if some solids at night would help him as he seems very hungry when he wakes. We are moving next week so I will start him on some solids when we are settled in our new house.

Good luck, doesn't seem to be a phase for us but hope that it passes soon for everyone else.