Do you think this is it?

I am 13dpo today, AF due in 2 days... Been having mild cramping and funny twinges for past 3 days.. Last night backache kept waking me up. I have tested the last few days but since pink lines don't show till closer to 10min I thought Evap. But today this is at 7min. I read that Evap lines are only grey and this is pink...