Lately I ve been really tired, even though I get 8 hours of sleep every night, well day since I work the nightshift. I have a constant feeling of being full, even if I haven t eaten all day. I can force myself to eat a full meal, but I really don t want to eat anything unless it s a really light snack. I ve been feeling nauseous alot lately, but never enough to throw up. I have alot of lower back pain and random headaches. My friends say pregnancy, but I got my period on time this month. My boyfriend and I use the pull out method. I know it s not the safest, but is there a way I can actually be pregnant and still get my period on time?