Was I molested as a child?

When I was about 6 my cousin made me undress and lay down while he would touch me and put things in me. He was only 7 himself so I do not know if what did he did to me was molestation or what. But I was forced and he wouldn't let me leave the room, he even made me use the bathroom in his room. One time I cried because he hurt me so bad and his mom knocked on the door and he made me tell her I fell. I can only remember one specific time, but he may have done it other times. I never told anyone and I'm not sure why I didn't but now I am older, and I find myself thinking about it a lot. Can anyone explain what happened to me? I remember it very well and even though I was young I knew what he was doing was wrong, but I was just to scared to do anything at the time. I fell like if I were to tell someone they would think we were just curious kids or playing doctor, or whatever, but I don't think that was the case because he forced me.