Hey hun , don't worry about it . I highly doubt that you're pregnant . You could not have gotten pregnant just from oral and masturbation . Not unless he had cum on his fingers and then inserted them into your vagina . However , since you have gotten your period and you took a pregnancy test and it came out negative it's clear you aren't pregnant , as believe.in.hope stated the symptoms you are experiencing could be from stress , try to relax and if it would give you some peace of mind maybe in another 2 weeks you could take another pregnancy test . I highly doubt you are pregnant so just relax (: Good Luck Hun .