Masturbation & Stuff

So today I fingered myself (which I usually never do bc I'm a virgin & I'm afraid my hymen will break or something) and whenever I went to the restroom a little blood came out. I just got a boyfriend & got my first kiss & I've been hecking horny ever since then. After that night, I started having discharge that was like red/brownish? I figure it's just spotting, but idk? Because I never have spotting. I don't have any pain and it doesn't itch, smell, or burn. I told my mom & she said if it gets worse we'll go to the doctor, but what could it be? I'm just an innocent lil bean who doesn't trust google lololol help a sister out