Super late

So my period is a little over 2 weeks late, I have been having ridiculous amounts of headaches the last few days, been cramping on and off, getting more and more tired physically and mentally.

But. I have taken 6 pregnancy tests over the last 2 weeks, and they’ve all been negative. I have an appointment in a few days. When I was pregnant with my daughter, I had a gut feeling I was, took a test and it said positive. Is it possible I’ve had an early miscarriage?? Or any ideas on what’s going on!? Help lol