Ever since my thyroid levels have been balanced out my cycle is 28 days +-1 day.. well I had all the…

Ever since my thyroid levels have been balanced out my cycle is 28 days +-1 day.. well I had all the symptoms for AF and she didn't show.. I then had a repeat of all the symptoms for AF but two weeks late and only followed by spotting for about 10 min.. and by spotting I mean wiping and just a the slightest of pink.

Took a pregnancy test 2 days late and was negative.. should I take another or just wait it out? I'm 15 days late today