My period is usually like clock work every 29 days. Week before my period was suppose to start i had usually period symptoms : tender breast, lower back ache , cranky. i didnt think anything of it. Well the week my period was suppose to start i never got it. IT is now 3days late.I had ligt pink spotting for two days and now nothing. I have taken three home prego test and all negative. MY lower back still feels little achy, i had headache every other day for a week now, and i have been feeling very emotional. Im 21 years old and have been with my bf (23yrs old) for 2yrs . Its not the best time financially for us to have a kid but we both wouldnt be mad if i was. anyways i just need advice. could i be pregnant? should i see a doctor or wait it out another month?