I am 8 days late, hpt negative. my last few periods have been 1/22, 3/4, 4/3, 5/8, 6/11. if could i be pregnant? if not when do i contact my dr?

Depends: If you had unprotected sex since your last period, you could be pregnant. You should see your doctor at the earliest, in case you are pregnant that you may start antenatal care. You may get a blood test for HCG level. Alternatively, you could repeat hpt in a week. Use first morning urine and follow the instructions for the test carefully. If you do not wish to be pregnant, use contraception all the time, every time. You may consider implanted contraceptive, or IUD. Practice safe sex.