Don't know what has happened to my 2 months old boy. He slept from yesterday midnight till now. No intention to wake up. Never cried for milk also. He only woke up when we tried to dream feed him. Any mum encounters this before? He has become very sleepy.

You're one lucky mummy and you don't know it! Haha. As long as he is waking up for his milk feeds regularly in the day time it shouldn't be a problem. The fact that you dreamfed him was supposed to make him sleep through longer. As babies can only have 1 long sleep in 24 hours, by dreamfeeding him you're actually breaking up his sleep. Say you put him to sleep at 12 and dreamfeed him at 2 his long sleep will start at 2 and probably end around 8? I can't say for sure as it differs among babies. Babies need a lot of sleep and I wouldn't worry too much about it if he is sleeping a lot at this age. Sleep is important for their growth and development!