Help!!

Okay so my last period was January 17! I should have started on valentine's day but it's been almost 2 months and no period I did take a test and it came up negative but that doesn't explain the nausea... please I need help my boyfriend is pressing on me to take another and in terrified of the results. He knows I won't abort but we both also live with our parents. And I'll get kicked out if I even get pregnant... what do I do?!