First ob appointment today

Mary 👶🏻✨Fairy • Happily married 2 years, mommy to a 2 month old ❤️
I had my first appointment today 
I have ulcerative colitis but my ob says that won't harm the baby in any way, I can finally relax now I was so worried about that 
They did blood work (I have a history of anemia) which felt like they were taking all my blood lol it was like 9 tubes 
I'll know the results tomorrow 
I was told that the screening for Down syndrome and other medical conditions is optional 
My doctor said she recommends it so I decided to have it done. It's scheduled for March 9th. I was just wondering how many ladies on here got it done? Do you think it's necessary, kinda just wanted everyone's thoughts 
thank you in advance 😊