Hello, I'm 29yrs old working women. It is 2 years since I'm married and we are planning for baby this year. We are trying from 2 months. Now I'm having missed period. My period is 31 day cycle. In this case I should have been on my periods on 24th July. But still it didn't get started. On 27th morning I took pregakem test for pregnancy it came as invalid meaning no lines at all. And I'm having tenderness in breast and nipples since 4/5 days and cold sore on my lips too. What should I need to do. Do I need to redo the test or is it some other issue.