sometimes that can happen before or after your period as the lining sheds, the blood is darker because of its location in the uterus. I'm guessing you do not see a OBGYN because if you did they would already have had you getting a yearly pap smear. Its a strange feeling but it will help if you are able to relax. Pap smears as well as regular exams from a OB are just as important as getting a check up to make sure your staying healthy. A Pap smear is a a quick test that helps make sure your vagina is healthy. Hope this helped answer your question.
I would like to know when was your last period and r there any chances of u being pregnant as threatened abortion often presents like this. All sexually active women should go for pap smears every 3 years, or earlier if anything wrong, this help them provide early treatment for any lower genital problem thus ultimately protecting them from cervical cancer. So don't be scared but you should consult a gynaecologist for diagnosis & treatment