Advise please....

Rachel
I have an almost 4 year old and I had a miscarriage at 9 weeks, 5 months ago with my 2nd pregnancy. Found out almost 1 week ago I'm pregnant again after trying for 3 months, im so excited but nervous at the same time, I have 40 day cycles my last period was the 14th August and was due back on the 23rd September, so im guessing im only a couple weeks according to this app im 4 weeks 6 days. I know I should inform doctors straight away but I feel im too early on, I just want to hang on a little longer I feel a tad embarrassed letting them know so soon as they don't do anything until you're at least 8 weeks anyways , any advise please?