don't like this feeling 😩

I'm due today and last night I had my bloody show. Today I was fine all day and about a hour or two ago I started feeling hot and lightheaded and dizzy I thought it was because I was hungry but I feel nauseous at the same time. 😩 I called the doctor to see if this was normal because i have slight cramping here and there but she said oh call when things are worse blah blah ...but I don't feel good 😡 is this normal ? Is labor coming soon?