How do i get over my extreme bug phobia?

I have a very extreme phobia to bugs mostly night bugs. They sometimes get in. I use to live in a house and everytime i would see a bug i would close the door and go in a different room but now that i live in a little studio apartment i cant just go in another room the only door is to the bathroom but the door is all screwed up and barely closes and dosnt lock So when a bug come in here i want to be able to just smash it or put a box over it or something but i cant i freak out and i cant help it. Last night there was this ugly bug and i mean ugly i didnt know if it flew and i didnt want it to fly away it was right next to my bed. I have a husband whos not scared of bugs and will just get a napkin and smash it so i stayed up all night until he got up just watching it the thing moved little by little and everytime i tried to kill it or put a box oer it it would move or jump which scared me. Is there anything i can do to conquer this fear. The only bugs im not scared of are flys and gnats and every small bugs. Please no rude comments and serious answers only.