masturbating hurts

So, I masturbated a few times before and everytime I put more than 1 finger in my vag it starts hurting... I’m a virgin but me and my boyfriend are planning to have sex soon and I’m scared that it’ll hurt. When there’s only 1 finger in there I don’t feel anything but when I add one, it start hurting. Maybe it’s a lubrification problem? idk... Will the pain go away when I will have had sex a few times? I mean will I get used and it will just go away?