Path to baby no. 4

So my husband and I have decided to try and conceive again. We currently have three children (a his, hers and ours). I had Mirena put in after Evan was born in 08. It's coming out tomorrow. I'm so excited! I can sense myself starting to obsess over getting pregnant again, wondering if it will take a while. When we decided to have Evan, I went through one cycle after going off the pill after being on it for six years and got pregnant. I pray this time goes like the last conception.