Bbt charts and metallic taste?

Kellie
Hi Ladies, just wondering if anyone has had different tastes to things and gone on to get a bfp? Sorry hard to explain. But I have a coffee every morning and this morning I have made 2 cups of coffee and tipped both down the sink as they had a metallic like after taste. I even tried 2 different brand of milk and still didn't help.. And yesterday got a random bout of nausea during the day but then it went away and I was fine. I don't know when or if I have even ovulated as my bbt chart is all over the place (will attach pic) I had a peak opk but have pcos so don't want to rely on it too much but also had ewcm at that time too. Glow and fertility friend both have estimated different ovulation days.. Anyone else had this?? What's happening with my charts? Thanks 😙