Are These Just Nerves?

I am hoping to get some good advice from people who have experienced similar things as me. Thank you and here is my story...

This part may help with advice. When I was in my early teens I was in my house on my own and was just about to walk up into the attic and I saw something strange. It looked like an old woman who was wearing a very old fashioned white dress and was just walking across the top of the stairs. This freaked me out quite a bit.

Also, about a year ago I was in work in a cafe and I was standing next to the sink and I am sure I saw a little girl standing next to me with long blond hair and a little white dress. What was weird was about a month later I was jogging past the shop next to my work place and the person I was with said he had seen something running towards the window towards us and he described it the exact same as me!

Now for my main story. It started about 5 years ago when I was in bed at my house. I randomly had this strange feeling in my stomach, like a nervous/excited feeling but there was nothing to feel excited or nervous about and I wasn't aware what it meant at the time. That night, we had a phone call saying that my sister-in-law had gone into labor.

About 3 years ago I had my next strange experience. I was in bed again in my house and I had that random nervous/excited feeling in my stomach. This time, somehow, I knew that there was something wrong in the house. I got up and checked all the electricals and it turns out that my parents had left a light switched on.

My third experience happened about 2 years ago when I was at someone's house. Again I had the feeling and I knew there was something wrong about my house. I called my mum and I said "there's something wrong with the house. It's in the hall by the front door". My mum checked and called me back and said that she had left the snip on the door and my brother would not have been able to get in.

My fourth feeling happened a week and a half ago when I was in bed. Again, I knew that it was something to do with my boyfriend's brother's girlfriend (who is pregnant), but I wasn't too sure exactly what it was. I text my boyfriend asking if everything was ok in case he heard something and later on, after I woke up, he text me saying that she had gone into hospital that morning because she was swollen everywhere.

I know these are silly little things but I would like to know if I do have some sort of gift and if I do, is there any way I can develop my psychic abilities? I would eventually like to be able to see and communicate with spirits properly. I have recently seen a good psychic and he said (before I mentioned anything) that I do have a psychic ability and when I asked "how do I develop it?" he said to get some Angel cards and meditate. Is this a good way to develop it and is there anything else I can do to help?

Thanks a lot and I would really appreciate the advice:)