What Could Delayed Periods With HPT Negative Mean?

I have never been more than a few days late or early if not on time for my cycle. I have two kids. I just turned 30. Im currently 7 days late no cramping or period symptoms. I have had a faint pos and 3 neg test. (Dollar store bc I used them with my first two) I'm having what looks like cm discharge. I already had this last month. I am also very gassy but not bloated at all. Where is my period?