Type of twins?

So I went in for a scan today because I was bleeding and thought I was miscarrying. Turns out I have twins!

I know nothing about twins. At all. I didn’t even know there where different types beyond fraternal and identical. I think it’s mono-di after doing some research. Thoughts?

Looking at the image you can clearly see baby A is a lot smaller then baby B. Has anyone had experience with this and carry both successfully?

pregnancy was hard and scary and know I have to worry about two!