Scared as Hell!

Ok so I am 6 months postpartum and I just took a hpt & it is definitely positive. This will be baby #3, I cannot afford to have another child. I took a plan b but obviously that did not work. I am completely distraught and don’t know what to do. My bf definitely doesn’t want anymore kids & his first answer is abortion . I am just devastated right now . We should’ve been more careful . I’m definitely beating myself up over this. I don’t know how to tell him . We live together as well.