Bleeding so nervous

So I am 6 weeks 6 days and I'm bleeding not too heavy but enough to show up on a liner and when ever I wipe. I did have an ultrasound and there is a heart beat. I called them and let them no but they said not to worry but if I'm soaking thru every hr to a half hr to come back in. I see a specialist due to previous complications and I trust them but it isn't easing my mind. Today is def "heavier" than previous days but I'm not soaking thru. I never spotting during my last pregnancy and I have had a miscarriage. I wouldn't mind input I'm trying not to freak but I am. 😔