Hello and thank you for asking HCM,
I understand your concern. If you are sexually active without protection, you should make a pregnancy
test a few days before your expected period. But if these bleeding appeared in the middle of your cycle than it can be ovulatory bleeding. Ovulation bleeding is the commonest cause of midcycle bleeding. It occurs approximately 14 - 16 days after the last menstrual period.
Ovulation bleeding usually lasts for only 2-3 hours and may be so slight as to cause only a brownish discharge that stains the underclothes. Occasionally it may last for 1 to 2 days but even then only a brown discharge with a few spots of red may be seen. Heavy bleeding is rare. A little blood tinging the profuse clear mucus secreted at this time is more common.
Sometimes ovulation bleeding may be accompanied by pain on one or other side of the lower abdomen. It depends on the site of ovulation - on which ovary is expelling the ovum on that cycle. This pain , also called 'ovulation pain' or 'mittelschmerz', lasts for about 12 - 24 hours. It increases on any movement, even during walking.
I hope this asnwer was helpful to you.