I cry because I love my baby too much

I just had my son Thursday night 8:56pm Jan. 11th, 2018. After 20 hours of labor I had to have an unplanned emergency c-section. I was very very scared but I surpassed my fears because I couldn’t wait to meet my son. Once I heard his cry as the Dr. pulled him out of me I cried, I cried a lot!! From the corner of my eye I could see him being cleaned up and I saw him for the first time and my heart just was full of love!! The nurse put him next to my face and I couldn’t believe that he was there!! so cute and tiny!! Once they gave me a room and me and my husband were together I just cried of happiness. My husband did too, we were feeling so thankful, overwhelmed so in love with our son. Now we have been home since Saturday and when I hold my baby I cry. I cry because I never imagined to love him to the point it hurts. I stare at him and cry. I can cry for hours just looking at him being so cute and tiny and innocent and fragile. I am so happy to be his mom and I am scared and afraid and worried of him growing up in this horrible world. I wish I could protect him of everything. I cry because he is already 4 days old. And I’m sad about that. I could stare at him and just cry because he’s my son and I just love him so much. I don’t know what to do to stop the crying.. I don’t know if what I’m going through is normal? I need help, I’m literally in tears as I type this.