My breasts are heavier and fuller and my nipples kind of tickle when they are touched.
I have a sharp stabbing pain when I sneeze or cough.
And I have been having mild cramps for the past 2 weeks.
What does this mean?

Could mean that you're getting sick. Could mean many things.

I'm not getting sick. I feel perfectly healthy.

When is/was your period due?

It was due around the 15th of this month.

I had unprotected sex right after my period last month...