What to expect during pregnancy

So I haven't been pregnant for 14years and I'm just wondering what to expect. When I was pregnant the doctor done the referrals but now its self referrals which was a shock, but when is my 1st scan from the NHS? Iv had a private scan when I found out and I visited early pregnancy last week ( high risk pregnancy) I'm 8 weeks but when do I go for my next scan is it 12 weeks? I'm so so scared to misscariage as iv had 5 so far in 14yrs..