Plan B?

Yesterday boyfriend fingered me . He was kneeling across from me and wasn't wearing anything. I held his penis and my hand . Once he was done fingering me ,he took a towel to wipe his hand and he wiped mine out. He then dabbed my vagina with the towel . I put my underwear back on and when I took it of I had stuff by my vagina,like when you wipe your self and there's tiny toilet paper pieces. It's my ovulation window should I be worried and take plan b.