my 4th child was unplanned,the circumstances were pretty difficult as well.abortion wasnt an option for me(personal choice)but many people who were trying to 'help' asked if i'd considered my options,even after i'd made it clear that in my mind i had no options.
i now have 5 children,and personally i dont find it any harder than having 2,3 or 4.(probably because my first 2 are still the hardest work!)
i have been in a situation where i was considering an abortion,mainly because the father of the child was putting me under pressure,and also because i was too scared to tell my mum i was pregnant(i was 20!).i spoke to a social worker and a councellor,neither of whom listened to me,and just said 'oh yes,it sounds like the best option for you'.it wasnt untill i was sat in the consultant's room discussing the procedure before it went ahead,that i was asked what i wanted.the 50-odd year old consultant said 'forget about your bf,forget about your mother,forget about the sw and councellor,what do you want to do?'and i squeaked 'i want to keep it'.
just thought i'd add my personal experiences as you said you wanted to hear from others who'd been in similar situations,but i agree with all the others,you and your dh have to do what you feel is right for you.