OMG - I would have given my right leg to have that much sleep with a 3 month old! I'm sorry I don't have any advice.. Tallon still wakes through the night. We've just had to go with it. I've been grateful tho that he's always gone straight back to sleep at night when he wakes.

We also went through a stage of 20 min naps through the day. His sleeping pattern seemed to change all the time.

I hope you can find some time to rest. Some babies are more wakeful than others, and this is completely normal, and often times you just need to go with it, and try and rest when they sleep.