Its been 28 days after having unprotected sex. Last month my period came on the 22nd of August to the 25th. Now this month 9/15 to 9/18 I had light pink discharge for two days and then a medium flow that lasted two days then it just stop just like that cramped right through those four days too. (not sure if that was my period or not). Well the 22nd of this month and nothing came or the rest of this week. Been feeling more tired then usual, peeing a lot, lightheaded with dizziness, gassy and backache. and is your vagina suppose to feel dry there is no itching either just dry.
Now is it to early to take a test.

You may have just had an off cycle and your period was not quite the norm for you. Wait until your next expected period and see what happens. Certainly if you continue to feel out of the ordinary, test sooner. Tests are inexpensive to use at home, or you could always see your doctor for a test there. Could be due to pregnancy, could be due to just being ill.

Often in early pregnancy you will start to see more discharge, but there is no hard and fast rule.

You can test, about two week, after a missed period. So you need to wait about another week. If negative, you may try one, each week, and see when next period is due