help advice needed

so i have been using glow for a few months/year now and so far my cycle has been right on schedule now here is where i need advice my last visit from af only lasted 3days now last time it was like that i had a second visit alot worse bout a week or 2 later this time i am waiting to see if visit 2 arrives now i took a preg test just before i had 3day visit negative my friend said wait this was just before xmas i rechecked again this mornin again negative now if glow is correct i shld be ovulating so checked thst also nothing my cervical mucus has stayed the same no change. has anyone else experienced anything similar and have u any advice have had bouts of feeling sick on n off randomly has since settled though still gt tired out just walking the dog i have dodged the nasty bug going round my wrk place so no that responsible.