Birth Control after baby - Mirena or the pill?

I'm 6 weeks PP tomorrow and I have an appointment to see my OB-GYN to for a PP follow up and to get the Mirena placed. I'm having second thoughts on the Mirena as I just had my first baby and my husband and I would like to have another baby in the next year or two. What do you guys suggest I do? Mirena or the pill? For those of you With the Mirena, what are your thoughts? Thank you!