Hi Im 21 Years Old Never Been Pregnant And I

hi Im 21 years old never been pregnant and i want to be all though ive had gono and hpv and dont think i can conceive but lately ive gained 20 pounds, always hungry, my breast went from a b to a large c in just a few months but most of all Ive been having a horrible sick feeling every day for the past month and a half but test say negative can you tell me anything at all?