Not necessarily.
You might bleed, but your lining would still be 'under the effects' of unopposed oestrogen for longer. So yes, you might bleed, but not all of the lining might be shed.
Is it not worth having a chat with your dr about this because if you have had an ablation, then your needs for a progestogen might differ from someone who hasn't.
For what it's worth, my gynae who specialises in menopause is happy for me to take 10 days x 200mgs, but as has been mentioned before here, I am able to access scans privately.
Maybe stick it out for another 5 days and see how you go? Fingers crossed it might not get any worse.