I had unprotected sex. My period was suppose to come on Junes 12 (it never comes after that), I missed it for 5 days. On the 5th day I had some light pink spotting which later on that day turned red and heavier than spotting. It went on for 3 days as if it were my period. On the 4th day it was brown then turned into the light pink spotting again until it stopped completely. Was that my period of a sign of pregnancy?

No one can diagnose pregnancy without an examination and/or testing.

You had unprotected sex. I am assuming you are trying to get pregnant.

Wait until you are 10 days late and then test.

But No, your period should vary each month, since some moths have 31 days and some 28, your monthly cycle should be a certain number of days, not a certain day of the month.

With that said, cycles also vary, so being late is not all uncommon.

A light period may be a sign, or it may not be, there is no way to tell.

Wait two weeks and try a pregnancy test with first urine of the morning