Sayang, I really think you need to see your doctor as soon as possible before the 27th, don't wait, okay? Situation macam ni memang kena be monitored closely, especially dengan history you mention. I know it's scary, tapi doctors know best for cases like incomplete miscarriage, especially kalau scan shows something unexpected. There's no safe way to speed things up at home, these things really need proper medical care. Go to A&E if you're worried before your appointment, or call the hospital to ask if you can be seen earlier. Thinking of you, sending strength.