Is it normal to be afraid of the thing in my room?

The day the real estate agent showed me the house her tour included a stop in the basement. There was a faded pentagram on the floor near the furnace. When I asked her about it she said that some kids had broken into the house and had thrown a few wild parties before someone had called the police on them. The basement had been littered with beer cans but the owner had hired professional cleaners to repair the damage as much as possible. They had tried heavy duty cleaning solutions on the pentagram, but they could not erase it completely.
But I was very concerned when I started staying in the house. My first night I was really tired after my big move. When I ran the hot water for my shower, I heard something that sounded like howling coming from the basement. I imagined that it was just the old plumbing acting up after being inactive for so long. I put off the shower and pulled on my robe and went to the basement to check the boiler. I didn't want a flood on my hands. I passed through the kitchen and noticed that it was 12:10 am exactly by the stove clock. I turned on the lights and went down into the basement. Nothing seemed unusual but I got the strongest, creepiest feeling that someone was watching me. I pretty much made a hasty retreat up the basement stairs. It felt like something was close behind me. I started to run up the steps two at a time and then I turned around and slammed the door shut and locked it. I listened for a noise at the door but didn't hear anything.
I called my boyfriend and he got mad because he had to work in the morning and didn't like being awakened. The jerk told me that I should just go to sleep and to make sure that I covered my entire body with a blanket because it would act as my force field against monsters. He also said that whatever I do, to not let my legs or arms dangle off the bed. Then he laughed, said he loved me, and hung up.
I was really upset so I made some Sleepytime tea to calm my nerves and make me drowsy. Around 2 am I went upstairs to my bed. My room has a huge walk-in closet and the doors were slightly open. I remembered them being closed. I wasn't feeling brave enough to deal with it so I just turned off my lamp, got into bed and pulled the covers over my head. After about 10 minutes, I sensed a presence in the room. I was so scared. I reminded myself that I was not a child and I mustered up the courage to move the sheet from my head and peek into the darkness. My eyes were probably playing tricks on me but I could see a dark figure about five feet tall standing at the foot of my bed. I actually fainted right there in my bed. When I woke up that morning, nothing was in my room but me and there were no signs of anyone having been there. I think this was a figment of my imagination! What do you think? Is it normal?