Help please

Hi ladies, I was due on three days ago, all I have had is VERY light brown discharge for these three days when I wipe. No red blood. Lower back pain has been dull but there. Cramps, light but not like normal period pain. I'm too scared to test this early so wanted to ask if anybody had had these symptoms and NOT been pregnant, do you have any underlying health issues like pcos? I'm 32 and trying for our first so aware I'm a little older hence why I'm nervous to test. Had an early miscarriage in September and it really plunged me Into a bad place. Only just feeling better. Thanks for any advice