Scared

I am 21yrs old.. 45 kgs weight... I had fever last month... on 24th of July I had an intimation with my boyfriend.. we didn't had sex.. bt we were all naked.. he was above me for a very little time.. bt he didn't inserted his penis.. he just fingered me for sometime.. I don't know that time he touched his penis or not.. bt he said he didn't touched it.. and he washed his hands before doing that.. after that he left and after 15 minutes. I washed my vaginal area.. even changed my private clothes.. bt now from 3-4 days m not feeling well.. I feel like hungry.. lower back pain . Little fever several ache.. sometimes stomch ache.. vomiting sometimes.. on 1st of August I did a home pregnancy test by Prega News in the early morning.. and the result was negative... I have even missed my periods... last time my periods started on 19th or 20th of June... I am very stressed out and very scared... what to do.. am I pregnant.. please help me... 😢😢😢

Scared