Test line faint and not complete??...disappeared 10 mins later??

Holly • 2 children...Both teens...endometriosis. ..hypothyroidism. ..general infertility. Second bout of ttc began 09/14
Ok so I did a test today...according to glow I'm two days late for my period. Friend had a test so I did it and the test line came in slowly and was there within testing window but it wasn't complete?..to make me more confused it disappeared completely at 10 mins???