Anyone experience this before??

So i ovulated on Dec 14th! I was supposed to start AF Dec 28th...i was crampy a few days before...i didnt start I've taken 2 pregnancy test all negative. I accidentally took an ovulation test yesterday and scanned it to my app it was high(peak). Today i have clear stretchy CM. I dnt feel pregnant. The last 2 day though i had a nasty metallic like taste in my mouth...could i be pregnant? Usually before AF about 5 to 7 days before i get sore breast and i can usually tell what day im gonna start i swore the 27th & 28th i was gonna start but nothing.