I have no clue what this means

So I am a freshman in high school and I gave my boyfriend a hand job after wards I changed my clothes etc but it was my first day of my period so I changed my tampon and I didn’t wash my hands first then later on I checked to change my pad and my period had stopped it is now the next day and my period is back but it is a lot lighter than before what should I do and what do you think this means?