Need to lose 35-40#

And I’m struggling. I’m 40 and hubby wants to try for another baby (my baby is almost 7 months and we have 8 others). I usually lose my weight but my eating habits stink and I dont exercise. I would love to just see what happens and not prevent but if I do get pg again I don’t want to be this overweight. I know it’s not safe to lose weight while pg but maybe a few pounds here and there? What did u do? I need a miracle.