I used mama mio face wash while pregnant and my normal moisturizer with HA , I spot treated with a witch hazel and tea tree blemish stick from boots, and used a rosewater and aloe facial spray toner. Now that I'm breastfeeding I'm using mostly AB products which I didn't know about at the time but are perfectly safe for breastfeeding(not sure about pregnancy but I would think so!) The main ingredients you would want to avoid are things like retinols, vitamin A, most acne treatments. There is a lot of conflicting info out there, I agree , you could always ask for a list from your doc on what is ok too.
During this period, the most important thing is vitamins and complete nutrition. I had circles under my eyes, I used Korean patches, but they didn't help. Pay attention to skin hydration, masks with vitamins.