What Causes Lump At The Vaginal Opening?

I had sex a week ago and we noticed some bleeding afterwards. Not much just pinkish and brief. I assumed my period was coming on, but it still had not come down. I ve inserted my vibrator lady night trying to bring it down, but although there was blood, I noticed I was also sore when inserting it. I stopped thinking I did it, but nothing was coming down. Today I thought it would help if I throughout the day tried to push it down. Later I noticed I could feel something like a clot maybe, coming, but before bed I decided to insert my fingers and discovered a lump of some sort kind of blocking the entrance to my vagina. I was instantly freaked and plan to visit my doctor tomorrow, but what could this be as I an very concerned I did something wrong.