He finally has decided--and now I have a question

Kelly
So Friday my husband surprised me with reservations for a restaurant I have been wanting to try. Something that's really out of character for him to do as well. When we get to the restaurant and order he looks at me and says "there is a reason I brought you here." Then follows it up with "I want to start trying to have a baby within the next year." I was shocked! 
Now I am in the place of not pushing too hard, but still have some questions. The biggest one being I just got an IUD placed in December, and I have been on daily birth control for 10 years. I am assuming with the length I have been on BC it will take me longer to get pregnant.
How long did it take others to get pregnant after being on birth control for a long period of time?