Baby fever

Ahhh am I crazy or what!? I have a 9 month old and a 2 1/2 year old and lately I’ve been getting the itch to have another baby. Im so sleep deprived and have zero time for anything but to survive and get through the day with the kids, but I want another. My 9 month old is also going through a sleep regression and teething bad. Why am I wanting another babe so soon, anyone else feeling the same way?