Hi Jo,
Bleeding is scary! I had some this time at around 5 & 6 weeks, but relatively heavy, red bleeds.
If it's just very light, and especially if it's brown, it is hopefully nothing to worry about. Like Traveller suggests, I would go to the doctor/hospital if it gets heavier or especially if you have a lot of pain. Does you clinic have an afterhours/emergency contact? When my clinic is closed you can call in and the message gives you numbers to call.
All the best