I wanted to add my experience and support OP, what a terrifying and emotional time for you.
As with the above posters, my anti-hypotentive drugs made me feel utterly awful, both physically and mentally, but I was able to breastfeed well (despite some hurdles caused by the drugs including 5 months of Reynold's Syndrome). DD was breastfed for 15 months, and while she was in SCUBU I was able to express for her. There is hope.
I love the advice of visiting the SCUBU/NICU - it was such a horrible, horrible shock for me (thinking about my first visit to DD still makes me cry) - hopefully a little trip around might make it easier on you. The midwives there were some of loveliest most compassionate people I've ever met. They became my friends during our stay.
Also ask if you can book a private room for yourself after delivery - I was immediately put into a busy post-labour ward after EMCS delivery (had not met DD at this point) with all the 'normal' deliveries while my heart broke. A private room would have given me the chance to cry, which you will need.
Ask as many questions as you can. I didn't, and I think many of the doctors and nurses were too busy to realise I just needed someone to sit me down and just talk to me - I didn't actually realise until a week after I had been formally diagnosed that I had PE - no one explained it to me and looking back, in fear I just didn't ask.
You've got a tough road ahead OP but know you have plenty of support on MN. So many of us have felt the bewilderment and shock you are feeling right now.
All the best, keep your chin up 