Am I pregnant or not???

So my period was suppose to start since February 21st and it havent come up to now I been having dreams or seeing my self in my dreams pregnant but I never told my mom and she woke up and ask me if my period start yet so I said no then she started to explain to me that she had a dream and they showed her me and said that am pregnant plus I been having really bad headaches and migraines like everyday and the smell of chicken makes me feel sick and I would randomly start feeling sick to my stomach