Is it normal to feel emotionally wrecked after stopping bf after 13 months?

[MamaMammalon]

Hello, feeling extremely strange after stopping bf. We stopped so suddenly- we both just decided we needed to stop yesterday after 13mths. I had been dreading it and becoming tearful even to think of it but it just sort of happened and seemed like the 'right' thing to do. I don't regret stopping. It was right. I just feel weird. Not necessarily sad but, I can't explain it?

Is it a hormonal thing, I suppose it must be. I just suddenly feel really unhappy and my relationship feels empty. Is this a 'normal' reaction? I even mentioned leaving earlier? What's going on? Is this some sort of delayed PND? I feel nothing but love for baby? HELP!