5 weeks is too early. Last time at my 5 weeks my gynae also saw empty sac. Doc asked me to come back a few weeks later to check again. Sure enough got one dot inside the sac lol. Try checking again later on.
You can check with your gynae. I've highlighted my hair during pregnancy. Doctor said it was fine. As long as the place is well ventilated so you don't breathe the chemical. can check also the ingredientdls safe for pregnancy.
Was told as long as the place is ventilated and has passed first semester can dye hair. Just inform the stylist that you are pregnant, maybe can choose the ingredients safe for pregnant women.
I drank hot lemon with honey. Seemed to help a bit. My doctor never prescribed me antibiotics. Even when i have tummy virus, she gave me probiotic only.