you are best to test for pregnancy after the first day of your period being late this will then give you a accurate reading.
yes.
You could be - it usually takes a few weeks for the pregnancy hormone to show up in a test.
This is not a sign of pregnancy. If you have missed your period and have had unprotected intercourse you should take a pregnancy test or see your doctor.
Usually 8 days after intercourse is the soonest that you can accurately tell if you are pregnant or not.
If you have had a negative blood test, it is very unlikely that you are pregnant
No you can't be pregnant and still have your period. You can have a light bleed but not a period. As for the whole negative test thing, it could be a false negative.
yes you are pregnant
It's possible you could be pregnant but the only way to determine this is by performing a pregnancy test 2-3 weeks after you last had intercourse. If the test is negative you can rule out pregnancy but if its positive you will need to see your DR for confirmation.
Yes. You could be testing too early.
Usually the way you become pregnant is by having intercourse, but it is possible to become pregnant if a man ejaculated, leaving semen in the area outside of your vagina. If your next menstrual cycle is late you should take a pregnancy test.
Yes it is still possible. See a doctor.
You could be pregnant, but if I were you, I'd go straight to my doctor.