Before you moved to be together.. what happened on days where he didn't communicate with you? Did it concern you then? Did you let him know? Did you get over wrought with paranoia?
What did you did do, what were you doing while you were still long distant?
Do you have abandonment issues? Have you been left before?
Lots of questions. But I went through a similar stage with my ex at the beginning of our relationship. I had a lot of baggage that ended up being the key to my lost 'happy go lucky' attitude to life.