I would say hi, but also try to give her space. I had this happen recently and when we got together I made sure to not focus on me and to let her do most of the talking. It sounds like you are mindful of her feelings. I'm sure you may have experienced disappointment if you've struggled with infertility, I know I did. Congrats to you though, I wish you the best :)
I understand what she's thing through. But if she can't be happy with you in your happiness.. She's not a true friend... Yes it may be hard for her.. But its not like you did something intentional to her
Congrats on your pregnancy.
Honestly? I would just give her space. It's hard when you are friends with someone stuggling with you and they become pregnant. I would say a polite and sincere hello, then leave the ball in her court. I know it hurts you too, but she has to come to terms I'm her own time.