young stupid and paranoid about being pregnant

On June 18th my boyfriend and i went to the movies he touched me but didnt finger me instead he poked something and it hurt he claimed to have no cum on his hands 9 or 10 days after the event on June 28th in the morning i took a pregnancy test that cameout negative and shortly after like around 5pm i got my period it lasted for 6 to 7 days i also took 3 more pregnancy tests that cameout negative (on these following days july 13th 16th and 24th). after the first situation i starved myself because i was stressed out since my boyfriend did both situations forcefully the only reason i havent left him is because im scared im pregnant. i ended up starving myself lost 15 pounds my abdomine is really hard. i was expecting to get my period the 25th but it came a day late which is pretty normal because im a teen and their some wat irregular my period came July 26th i still have it and its been 8 days is that normal? on june 26th i gave my boyfriend a hand job and he cam all over my hand he whipped it with a towel and after he did i whipped my hands on my pants i grabbed my phone and 10min later i came home once i got home i needed too use the restroom and i whipped myself with toilet paper could i have transfered sperm from my hand to the toilet paper to my vagina? i washed my hands with soap and water after i used the restroom also 6 hrs later i masterbathe. My question is can i be pregnant? whyy can my abdomine be hard i also feel tired stressed to the max and i feel light headed when i get up i need help plz!!!