Morning sickness

So with all my other pregnancies I started getting sick pretty early, and I hate it of course but there was 1 pregnancy I didn't and I ended up miscarrying about this time (5-7 weeks) and today I am 5 weeks 2 days and no signs of miscarriage but no signs of morning sickness either...it's making me really nervous. When does it usually start? I mean on average? I have been pregnant before and had it and remember it being early but I don't remember how early