Hi . I really need answers , OK I am 16 I feel pregnant I am on the implanon me and my boyfriend have sex a LOT with out a condom and comes in me also . I've gained 20pounds :/ I am getting asked a lot if I am pregnant , I do feel nausea all the time I get headaches I haven't had a period I get rally bad lower pains and in the stomach and really bad lower back pains :/ I feel tired a lot , Im started to feel emotional and depressed can I be pregnant ?