This happen to me at 16wks-20wks and I'm just starting to feel pregnant again I'm 31wks now:)
Its normal. Not everyone feels pregnant until the end. I had horrible nausea at the very beginning & went away by 18 weeks now at 36 weeks i feel horrible again.
I felt that way at 16weeks. I was no longer having morning sickness and didnt really habe much of a belly yet. Once your belly is big and you know the gender and start feeling baby kick you will feel prwgnant again.