unsure of what to title

Lauren • 24. 4 years with the love of my life 💕
I've been spotting (light pink / light brown) for 2 weeks. Today started extreme lower back pains and small pain in my ovary areas when using the bathroom.. Took 2 inexpensive pregnancy tests yesterday and both came out negative. 
3 years ago we became pregnant however we had no heart beat at 10wks and had a DNC procedure. I'm not sure what a real miscarriage feels like and I am a tad worried after reading some blogs. Any thoughts? Could this be pregnancy or a miscarriage or neither? Should I wait another week and test again? Lost 🙄