Hi Suzanna
I agree with Sarah2 that your dose may actually be too low for you but that would be to discuss with your consultant perhaps - or your doc, although you would have to be persuasive if she is wanting you to stop.
Starting your period the day after stopping the combi pills is not late at all! The thing is when you take tablets the amount actually getting into your system can vary with factors such as what you've eaten, digestion, alcohol, stress etc so any of these may cause a drop in progestogen levels in your body and trigger the bleed before you've finished the course of progestogen and this is normal, I understand.
I am surprised the doctor didn't want to investigate further the cause of your chest pain?
Well done with the weight loss by the way!! This will reap benefits as far as your general health is concerned as I am sure you are aware!
Hurdity x