I have done about 5 pregnancy tests since getting a positive on the 27th August. They have all been positives still. What I don't understand is that I am due my p right now and instead I have got dark brown D, this has been for the last few days. There is no pain. I have also had fuller achy breasts for a couple of days. In the first week I was pregnant I felt sicky and had period pains, which all stopped when my period was due.
I am about 3 weeks pregnant now.
Does anyone know if any of this is normal?

I have an appointment with doctor on 15th aug.

Yes, this all sound very normal. The discharge could be that your body has not built up enough hcg hormone to tell itself not to have a period at all, so you are having a slight period.

You can stop taking the hpt's since you are pregnant. Nothing will change now.

I am assuming you mean that your dr appt is on sept 15, not aug 15.