39 ..pregnant and i dont want to have it

Hello, Im 39 yrs old. married with three kids ..ages 19 , 17 and 7. I decided after my last child that I was done bearing chldren. My husband and i have always protected ourselves but about 2 months ago the inevitable happened..the condom broke..I did not think anything of ot because a few days later i got my period..well in March I did not get my period ..felt weird..i went and bought a pregnancy test 3 days ago and it came back positive..i felt confused and upset..also felt guilty. My husband is begging me to have it but i dont want to..i feel that im too old to start again..that I finally have some time to do thimgs for my self now that my children are a bit older and I just dont want to start all over..ive made 2 appts that i have not kept because my husband keeps telling me not to..I dont want to go thru this again..please give me some advise..thank you