Search Results: not returning phone calls

This is going to be a long story. For that I apologize. I am seriously just at my wits end.

I met an awesome guy via a dating app. We met for dinner and hung out the very next night again. We talked for a week prior and he informed me that he was leaving the country for a month for work. He's a security contractor/analyst. He basically does what soldiers do and gets sent to foreign countries to aid in protection. After meeting him, I decided I was okay with this. We sparketed. He asked me to be his girlfriend before he left. I told him no. I wanted to see how we communicated, how I handled the distance and amount of time and I didn't want to rush something.

So he goes overseas for a month. I hear from him every day. We really get to know eachother because we have to talk. There is no physical distraction. At this point I fall hard. He comes back, I agree to be his girlfriend and we finally sleep together. Here's what's got me feeling weird. When he returned, my number somehow became blocked on his phone. ONLY my number. I called him from my friends cell. He said that his phone had been hacked and got a new phone and a new number. Remember this for later.

So for the next two weeks everything is awesome.. He tells me he loves me. I say it back because I felt it. Nine days ago, he had to leave last minute for an assignment in Guatemala because there was an issue with a client. He left last Tuesday. He was supposed to be gone for 5-7 days. It's day nine, I have tried texting him (not obsessively) and actually sent him a few stating that I was concerned. I am worried. I have not gone a day since we started dating without speaking to him until now. So tonight, my emotions and concern got the best of me. I tried calling him. I called his new number. No answer. It rang. He has service. Something in my gut told me to call his old number, It rang four times and was forwarded to voicemail.

I care for this guy. But I feel like something is up. Please help.

Shy guys, If you really liked a girl and she was a friend of yours and you thought that she liked you as well but were unsure of what you wanted, would you pull back and not talk to her for a while? Not cut off contact completely, but not reach out or not return a phone call or a fb message.
Not knowing what you want, I mean in terms of a serious relationship, like if you felt she was someone you could see yourself marrying and you weren't sure what you wanted would you pull back for a while?