ive been asking questions and noone answers please answer!

[irenemalik]

last month i gave my boyfriend a hand jod and then i put my finger in my vagina! i used my right hand to give him the hand job and i put in ny vagina my left hand.. but it maybe had a little semen.. im not sure ..usually i dont have on the keft hand when i do it.. any way.. i was SO SO stressed that i was pregnant but i didnt miss a period  but i wa sstresses so i did a pregnancy test and it came back negative and the. i had my period for 6 days as  usually ...when my period ended i was reading articles that were saying that you can be pregnant and still have your period and because i felt a little weird i thought again that i was. pregnant .. i was having pain in my stomach and i felt gassy ...i did a pregnancy test again ..again negative ...but i continued feeling this way so i did again a pregnancy test yesterday..and it was again negative ..but i some women sya that they did like 10 test and were negative and they were still pregnant so im freaking out i feel gassy and batterflies but i dont want to go to a doctor cause im young and my mom is going to kill me if i tell her somthing like that.. please tell me what to do .. please help me... me and my boyfriend even spoken to our biology teacher because she is so close to us.. and she is telling me that theres no way i am and she keeps asking mr why im so stressed but i feel weird..i feel weird in my stomach thats why i think i am pregnant .. help me :(