I have an 8 month old son, and i want to be pregnant again! Is this normal?

My son is 8 months old and ever since he was about 3months old, i have wanted to be pregnant. I know that is a part of depression but i don't have any other symptoms. I miss being pregnant but most of all I want to be pregnant so i can give birth again. My first experience was traumatic and empowering at the same time. Basically, i was sent home when i shouldn't have been and ended up delivering at home because of the neglegience of the nurse AND doctor. Right after my son came out i felt so invigorious and excited that i had just given birth to him. I watch a baby story all the time and see how most births are so i think i just want to also experience a "normal" birth where you are hooked up and they tell you to push. Plus i want 4-6 kids total. Im so ready to have another baby but i think it would be unfair to my son since he is so young still and needs all of my attention. Im just thinking about him. What do you think?