3days ago my boyfriend fingered me and we didn't have sex but for the first time got both of us he got in me very brief like just one second for only 1 inch and I jumped away because we didn't have any protection I washed myself immediately after but I'm having light spotting in brown like the beginning of period just the day after with a little pain in the first day, also i had my periods 2weeks ago and my cycle is usually 31days ,Should I worry about it? Is it for hymen ,ovulation or may it be pregnancy?