Can I just say, good for you! It's great that you are putting your baby first! Good luck!
I was the same way..did it everyday then when I found out I was pregnant quit cold turkey. Didn't have any urges and everything and baby was fine. Just make sure you stay away from the friends you use to smoke with..you will feel like you want to then!
There is no withdrawl from marijuana. No worries. Glad you stopped :)