18 days late for AF!

faith

Me and my husband have been TTC for over a year now and I am 18 days late for AF. I have symptoms such as cramping, really bad headaches, gas, nausea, and swollen boobs. I have taken 5 tests and they all came up negative in the time frame but after an hour or so they all have pink lines so I’m not sure if they are just evaps or not. Can someone help?