I would suggest going to your gp, however you are seeing your obgyn tomorrow, it may not be ectopic/miscarage.
When i had my ectopic i found out i was pregnant at 3.5 weeks, i then had extreme stomach pain at 5 weeks followed by brownish bleeding a few hours after, i was then ok for a couple of days and was told i was miscarrying, however the pain came back worse then ever and i was rushed to hospital and had to have my tube removed, have you had any pain? Ectopic pregnancy usually have pain associated with them.
In the meantime if you have any pain especially where your ovaries are or shoulder tip pain or suffering from a high temp please go to your nearest ED. I hope you are well and my experience of my ectopic has helped you some way. x