Decreasing appetite in week 17

Had increasing appetite when I reached week 13, and now it’s decreasing back again. I used to it 3 meals and drinks in between but now I can’t even fully eat a McDonald’s burger and drink water together! I would puke if I ate more than a burger and drink water after that. Is this normal? It should be the hormones doing it’s work right? Any mum’s faced or is facing the same thing? #1stimemom #firstbaby #pregnancy