Im stressing out

Hey guys so im a mother of 4 my youngest baby is.6 months old coming up to 7 months old both myself and my partner decided for.me not to go on birth control due to it effecting my moods.and giving me bad mood swings we have been really careful but this month i forgot to get the mor.ing after pill (yes i know how stupid i have been) but i did think it cant happen it has taken me 1 year to get pregnant each time ive been trying with my other babys im so torn as ill if i keep the baby i will be pregnant when i go back to work, we already have 4 beautiful babies and i cant help but i always said i couldnt go through with having an abortion i just really dont know what to do i dont have anyone other then my partner to talk about this situation with i completelyknow how stupid.and irresponsible of my self and my partner i dont need judement i just need to have a vent kind of thing. Thank you x