You probably shouldn't listen to any of our advice here considering your self-professed situation. Take everything here with a grain of salt. It's not my intention to hurt your feelings. Also I'm sorry that happened anon, don't let it control your life.
My personal opinion is that it depends on how you look at it.
1.) A penis entered your vagina and therefore you have had intercourse technically/biologically speaking.
2.) It was involuntary and therefore you exclude it / don't count it. But that's more of a psychological dilemma.
Honestly just focus on creating and maintaining healthy relationships and move on from your past experiences.