HELP PLEASE i think i may be pregnant and im only 15

hi im 15 and i think i may be pregnant but the thing is i didnt have sex with my boyfriend..and i really need someones help ive never bin so scared before in my life
this happened about last thursday and we just finished going swimming so we were both in our bathing suits so i gave him a hand job and he cummed and then basically my bathing suit was riding up so i pulled it down and basically banged myself im really worried that i may be pregnant but i have no idea what to do im not to sure how long you have to wait until you can get a pregnancy test and i dont want to tell my mom because i dont want her to worry about it since shes already so stressed and then i was looking at abortions in case i am pregnant and i dont know how long to wait to go and get one if i am or if its for free and all of that stuff
can someone please help me i cry myself to sleep about everynight im so scared and dont know what to do
can someone please respond to this and help me