Ttc but stopped having sex :/

Fran
On the 14th of Feb and my bf decided to try for a baby since then we have had sex twice :/ usually we have sex twice a week but it's like the thought of making a baby is just putting us both off not sure what to do maybe say I've gone back on the pill might make it easier we was hoping to have a baby around Christmas time but I keep saying to him you know you have to have sex to make a baby! ...Did anyone else have this problem