Just found out.im pregnant with a 4 year old

It took 12 years to concieve my current 4 year old. Its very very difficult for me to get pregnant. Well, for days ive felt aweful. My periods are always irregularso it.wasnt a sign for.me(i have one ovary). I decided to take a test last night cause of the way ive been feeling. It came.back positive instantly. Im scared. I dont know what were going to do. We live in the.smallest house imaginable. My first pregnancy was so hard. My first baby was so hard and i.dont know i can do it again. Could i even love another child the way i love my first. Will.my first child be angry that i had another. Shes the sweetest girl. Im so scared im making myself sick.i just got a new job as a pharmacy tech coming from bedside at a hospital. Will they fire.me?? Im so soo upset. Im just starting nursing school a 2 year program.