Has anyone ever got pregnant while on the pill?

So last week I found out that I am pregnant. I am 5 weeks pregnant and going insane trying to figure out how I got pregnant. I have been on it for 11 months and took it every night like clockwork. I was also taking other medication for depression but my doctor said that those do not interact with the pill. Has anyone else ever got pregnant on the pill? My husband thinks I am deceiving him some how. I am so much in shock since this is very much an unplanned pregnancy.