Today I'm 10 days late. I've took 2 pregnancy tests (3 days late & 7 days late) both were BFN . I've been feeling nauseous and having light cramps and slight back pain. My nipples are a little sensitive but not too bad. i had bled brown around the first week of January for about 2 days. Could I be pregnant or is it all in my head? When should I take another test or should I go get a blood test done?