Preeclampsia questions

So I went to a different hospital to get my anatomy ultrasound done as my hospital is currently being bought by said hospital so they haven’t moved a ultrasound tech to my hospital yet. At the beginning of my pregnancy I had very low vitamin D so I was taking extra to get it back to normal. My actual doctor said all was good and just needed to take my prenatal. But this other doctor said that I need to take two aspirins to Prevent preeclampsia. I’m like ok? My doctor never had any concerns of this and was very happy with how my pregnancy has gone. I didn’t have it with my first I don’t have high blood pressure or anything that would indicate the risk. So I’m very confused on what is going on I did call my doctor but she is on vacation. Also the other doctor ( not my doctor) is a high risk doctor which I’m also confused on why I went to a high risk doctor if my doctor never had any concerns.

Has anyone had an experience like this what happened?