Too scared to be in my own home!

A little over a month ago i was getting ready to head out to meet with a tent vendor for my wedding. I was home alone as my fiance was working that day. I heard the doorbell ring so i went to the window to see who it was. I never ever answer the door unless i know who it is. It is something my parents taught me and i have never quite grown out of. Either way, when i looked there was no one there so i went back to my room to finish getting ready. Then the door bell rang again and i looked again and still there was no one at the door. I figured it was just some kids playing ding-dong-ditch on the new people ( we had only moved into the house three months prior) so i decided to ignore it after that. But then they began to repetedly knock and ring the bell so i looked out agaain and saw a young man testing to see if the door was unlocked! I immedeately tried to call my fiance who only works about 15 mins away but when he didnt answer i called 911. I told them someone was trying to break into my house and they told me to lock myself in a room until the police showed up. I locked myself in the master bedroom and while still on the phone with 911 i heard the window in the master bathroom shatter. I began to scream and ran into the guest bath with only a mag-light flashlight for protection. The man never got into the house as the police (who arrived a full 15 mins after the window broke) thought that my screaming scared him away. They did find who they thought it was by following the trail left in our neglected lawn. The suspect lives not 500ft from my house on the property right against the back of ours but they can't arrest him because i was unable to pick a suspect out of the line-up they provided for me.

Since then i cant sleep because i keep reliving the moment the window broke over and over. I can't stand to be in the house alone despite the fact that we got a security system installed in our home. I dont like to even be in my bedroom because that is where i was when the window broke. Every time i hear the doorbell ring or someone knock on the door i think that its him and i am right back where i was when i saw him jiggle the knob on my front door. I'm terrified all the time and i don't now what i can do. Is this something i should see a doctor about? I just keep reliving it over and over again! I need some advise. i cant stop crying and i'm terrified every time my fiance leaves for work in the morning. I'm angry and scared and upset and so many other things. I feel like I'm stuck in that day. Please help me.