On July 7th I had unprotected sex, expecting my period the following day. It never came, I am always 28days on time with my period. I started getting pregnancy like sympthoms like fatigue,headaches,cramping,bloating and I thought for sure I was pregnant. But after 21days have passed, I began to bleed. Is it my period or am I just bleeding?

There's no way for anyone online to give you the answer to that question. It's impossible to diagnose pregnancy online.

If you're concerned you could always try a pregnancy test. That's really the only way to find out.

Good luck.