Hun don't panic
I had a bleed at about 5 + weeks and I was terrified too hun. I went to A&E and they refered me there and then to an EPU and I was scanned (everything seemed as it should but at 5 weeks they can't really detect a heart beat so I had a 2 week wait for another scan).
I know this sounds a bit gross but think of what it is like if you go for a wee when you're 'on' and that can make the water look very red even though you are only supposed to loose a small amount of blood the whole time you're on your period.
Are you in any pain? You've not mentioned that you are so I guess you're not, which is also a good sign.
thinking of you hun

If you are still worried see if you can get your GP to refer you for a scan. xx