Virgin or not?

So I've always have had an internal conflict when I get asked "Are you a virgin?" My instinct is to say yes, because I haven't had sex that I've actually consented to, but then I recall a moment when my ex forced hisself upon me while we were both drunk.. I know what happened partially. I know he penetrated me because the next day I was bleeding and very very sore down there. It was unwanted. I regretted it in the moment and for sooo long after. It's a secret I've kept for so long because time has passed and I feel as though it is too late to even say anything.. Or do anything. 
Pretty much my question is , can I still consider myself a virgin? Or would it be wrong of me to lie...