Dreaming about ex 💤

Ever since my boyfriend broke up with me a couple days ago I've been doing really Good about it because I realised we weren't good for eachother. But now every time I sleep or nap I have a dream about him and He never used to be in my dreams at all. All the dreams are us getting back together and sorting things out so then when I wake up it makes me feel sick and I normaly vomit. I don't really think about him before I go to sleep because all I have been doing is sleeping and napping and taking my mind off him. Is it normal to dream about ex after break up and would be most likely be doing the same?