Oh bless try not to worry could be loads of things and it's good it's not heavy and no pain. Can you put a pad on and monitor the bleeding and call EPU or gynae out of hours tonight when you can and maybe get checked tomo? I had bleeding weeks 6-8 and it was heavy at times too. Bleeding is common in early pregnancy but you should get it checked x
Nb there's not much hospital can do anyway so don't worry about being miles away, for me they did a scan to see if there was a heartbeat to reassure me. There was so, rather than do bloods to check hcg was rising, they were content. I was still bleeding and it got heavier, but they said there's nothing they could do but wait a week and scan again to see if growth as no point doing before then. they found cause of bleeding on scan - haematoma from digging in at implantation so they said I should expect bleeding and only to worry if pain. Fingers crossed.