Finding it hard

In the mornings when I wake up I just feel so low, I've recently broken up with my boyfriend and I'm finding that as soon as I wake up I get this awful feeling where everything crashes down onto me. I do get other points in the day where I'm quite sad but the mornings are also so difficult. I just wanna cry and not leave bed because the feeling of missing him hits me like a tonne of bricks even though I don't wanna get back with him, it's the right thing, I just miss him so much and crave his presence, a hug from him is what I need sometimes. It does eventually pass and it's weird the evenings I'm okay, like I don't really feel sad. Why is this? I have an appointment with my doctor soon to talk about anxiety so maybe I should bring this up. Does anyone else feel like this when they wake up?