Advice needed!

Hi ladies,

Me and my husband are ttc. This month on 8 DPO, I had a faint line with easy@home test. At 9 DPO, no lines at all and at 10 DPO line was back and I tested with First Response as well and First Response was very negative. Since then I am testing with both brands and there are no lines. I read some reviews of easy@home tests and many people experienced false positives. I am 13 DPO today. And my AF was supposed to come yesterday, I waited all day today for AF and its not showing up. I have a back pain (I don’t get back pain with my AF I only get very painful cramps), my eyes are aching. My AF is normally never late. From now and then it is a day early but never late. Does anyone have any idea what might be happening ? I will get an appointment with GP if it doesn’t come in a couple of days but I don’t want to book an appointment for this week just in case it comes. Thank you so much!