When to test

Paige

I am currently 16 dpo & on day 2 of missed period. I took a test 2 days before AF & 1 day before AF was due & both were negative. So I took a test today ( should be day 2 of period) but it was still negative. I have no period symptoms & no pregnancy symptoms. Once in awhile I get gut twitches. I have been super gassy though. When should I test with an early detection test that you buy from the store? I’ve been using the at home individual strips.