How Can I Communicate With The Ghost That Follows Me?

I first started noticing my abilities about a month or two ago. When I first started noticing them they weren't very strong at all. It was at the point where I wasn't sure if I actually had any abilities at all.

But now I'm sure that I do. I have precognition and I'm a medium. I can sense the presence of ghosts, I just know that they are there. I can sort of hear them. I can't hear them talk but I can hear the sound effects they make, like I can hear if they walk around sometimes. Now I can usually predict the outcome to a situation or I just get a feeling of what's going to happen.

One time my mom told me that if it was raining hard she would pick me up from school but if it wasn't raining or only misting then I could walk home. When I went outside I truly didn't think it was raining that hard so I started walking but when I was about half way home I got the feeling that my mom went to the school to get me. I figured I was probably wrong and let it go. But when I got home my sister told me that my mom was annoyed because she went to the school to get me and I already left.

Also, to test myself before, my friend (who is an empath and has a little bit of precognition and a medium) and I were at a park near our houses and we were trying to test our abilities and we would both guess what we thought the exact time was and then we'd check our phones. Most of the time we were both either right or off by one minute.

Even at school we can tell what's going to happen that day. One of our teachers, who usually yells at the class when more than one or two of us don't have our homework, was collecting homework that I didn't have and earlier that day I felt like she wasn't going to yell even though a lot of us didn't have it... And then she didn't yell or even get mad at all. I was really surprised by that.

Also, I think that there is a ghost in my house, my room specifically. My room is normally the hottest room in the house, especially in May, but not today. I am sitting in my room and I am freezing. I also feel like there is someone right behind me now, but I know there's no one back there. Sometimes when I'm at school I feel like there is someone right there next to me or behind me, even when there's not. I'll also see shadows in the corner of my eye at school but when I look nothing is there. My friend who can hear ghosts and smell them and sometimes see them thinks our school is haunted. I think that the ghost from my room follows me to school.

Does anyone know how I can communicate with this ghost?