Talk to Gynecologist on Menstruational

I had intercourse on 5 MAY got my periods on the 7th. Next month my cycle lasted for 28 days and i got my periods on the 2nd JUNE everything was normal. but this month i did workout for half a month on 4th i saw brownish liquid but no flow of blood when i put my finger inside i did see some blood on my finger its now 6 JULY I see no blood no spotting whatsoever. I did have some cramps through out the day on 5th and i even had sore breast like i normally do. What can b the cause ? I tired taking warm bevraged like tea and stuff .