please someone give me advice

Can someone please give me advice I think I could b havin a miscarriage! I already have 3 boys this time last year I had my first miscarriage now I am 6wks 2day and started bleeding (brown) 3days ago it is very light but have sore cramps mw has me booked In for a early scan in 7days can't stop crying and worrying I want this so much