Bring food, water and something to read. If at all possible, have someone look after the other children, it can be so tedious waiting with children as there is nothing for them to do. If you are bringing a toddler, bring snacks, toys etc.
congrats on your pregnancy
I was had 3 to 4 hours in my head for my first visit (last year) but was out in half that, they split everyone up some seen midwife first. then doctor, then bloods then scan but I was told to do bloods, scan then back down clinic and was seen by midwife and straight into the doctor….. doing this make the system move better. No point in 20 woman waiting for doctor, bloods and scan at same time