Pregnant and dealing with depression?

Rose • Spoken word/slam poet who is working to compete nationally. I love coffee, books, and babies. Obsessed with Breaking Bad
I've struggled with depression off and on my whole life. I started FINALLY seeing a therapist this fall who has helped me a lot. I was doing really well but the hormones have been kicking me in the ass lately. Today was particularly hard. Luckily I have an incredible partner who loves me and encourages me. But it's been so hard. Depression is making me fear that I will inevitably f*** something up in this pregnancy up or be a bad mom. 
How do you handle these feelings and fears?