Wow I'm tired and confused

I love my little due with all my heart but wow my feeding and caring for him is sooo stressful. I feel like I'm constantly worrying about him. He was poorly for the first week of his life (in special care) and I planned to breast feed but being across the hospital being treated meant I didnt get that bond to breastfeed straight away. I ended up using formula because I was shattered and couldn't persist with his feeding when he was poorly. Now hes back home and feeding is still hard. He takes bottle formula bottle breast milk (I'm waiting for my supply to come in) and breast. I feel terrible for chopping and changing feed types but atleast he is feeding right? Hospital meant constant checks throughout the day for both him and I and very little sleep. All the interruptions meant I was never relaxed in hosp and now I am home it's been constant interruptions of visitors. I've woke up and today is my day of zero visitors and i need to settle into a routine..... I'm going to persist with just breastfeeding today..no giving in! Anyone else feel like this?