Vomiting & diahrrea in pregnancy

I’m 12w 6 days pregnant and I’ve got hypermesis (been vomiting almost everyday since week5). For the past week, I’ve had this weird stretching pain from both sides of my belly button and above my hips but I put it down to my uterus growing.

Yesterday was the first time I managed to eat a meal in 3 days and a few hours later, I got extreme sharp abdominal pains followed with severe vomiting (literally a pool of vomit in my bathroom) + explosive diahrea. The diahrea continued today but no pain and I’ve also strangely not had any of that stretching pain I’ve been getting for a week straight..

Should I be worried? I called the hospital today but they told me to wait 2 days as I have my scan then. Can’t help but be worried. I’ve had some nausea today but not as severe as I have had everyday too.

I should be glad but I’m just so worried as I’ve had 2 previous miscarriages and this is the first pregnancy I make this far.