Concerned. I need help please

Should only be around 5-6 weeks. Can’t get a positive test but my period is over 3 days late. I had some light spotting pink and brown over the weekend. Yesterday(monday) I had one instance of blood coming out but I haven’t had any blood since that one time. It wasn’t a lot barely enough to fill a pantyliner. My boobs have hurt and I’ve been feeling nauseous for a few weeks. I’ve had four miscarriages before this pregnancy and this doesn’t feel the same. What should I do?