HCG increasing but slow, morning sickness and bloating still game strong. What should I do?

Hi Mummies, sorry for the long rant ahead. I'd a HCG blood test done on last Fri and on Monday, to compare the levels over 72h. Results came back but not in ideal range. Usual HCG should be doubling, or at least 60 to 70% increase, but mine was only around 30% :( so far, I should be into my 7th or 8th week, but due to bloating, ultrasound was unclear only manage to capture a shadow in gestational sac. However, my morning sickness thru the day is still going strong with all the bloating and fatigue. Only seeing Gynae this Fri, and I'm still worried :( already on Duphaston currently, what else can I do?