Should I be worried?

I believe I’m about 14 DPO and this test was on very dilute PM urine so I’m hoping that’s why it is so light. I’m a little worried because I’ve had brown spotting the last few days and expected my period to start. I felt nauseous this afternoon and that’s why I tested. I have had a blighted ovum miscarriage in the past. I also had a cone biopsy 3 months ago so my mind is going crazy right now. This is a happy accident and I’m hoping I’m worrying for nothing. I will test again in the morning and hope for a darker line.