Morning Sickness... At Night!!😬

So I have to little girls already (hoping for our baby boy this time) and never had any type of sicknes!!! Well here I am 6 weeks pregnant and for the past 2 weeks I have been experiencing (what I think is) morning sickness... only at night! Around 7pm into the night I start feeling super sick to my stomach and sometimes have what I feel like is hunger pains, but I know I’m not hungry. I haven’t thrown up but just feel so nauseous and blah! With some back pain and Tummy pain. Has anyone had these type of symptoms before? Just trying to make sure I’m not crazy!