Really regretting not getting the screening to see if my baby has Down syndrome or other cases

I'm 15w and 3d I didn't have my first apt with the ob doctor till about 11 weeks and they didn't really tell me much about anything they were in a rush and didn't go into depth about any test or the pregnancy or really anything then I went to my next apt at 12 weeks and I told them I would like this test and they said sure we can do that then they ended up not doing it and now I'm upset that it's too late