Implantation bleeding

So I was spotting light pink for 2 days off and on not to worried but then today I started bleeding BRIGHT red and it's been for a few hours now. I went to urgent care and I've had a mild stomach ache but nothing like cramps when I had my period. I'm 7 weeks (according the my last menstrual period) and haven't had my first drs appointment yet and the Dr at urgent care said not to worry it sounds like implantation and he's not worried. Any one been through the something like this ?