Breastfeeding fear.

Hannah • Hey my name is Hannah. I am a 27 yo SAHM 💙👶🏻 💙4/29/16 💙👶🏻 💙4/23/18
My son is 11 weeks old. I had a very difficult delivery and was hospitalized for a week after he was born as a result. In the hospital he was exclusively formula fed. When we got home I started breastfeeding and supplementing with formula. Then when he was 5weeks we exclusively breastfeed. I pump everyday and am getting 5-6 ounces per breast. Breast feeding has really helped me bond with my baby.  I'm going back to work soon and I've been having panic attacks that I'll lose breastfeeding. Has anyone felt the same way? Does anyone have any tips for coping with this fear?