Basal body temperature an ovulation

I have been using coconut oil for the past 3-4 weeks to increase my metabolism and lose weight. My basal body temperature has increased by .5 degrees since then, which while excellent, because it indicates to me that my metabolism is increasing, is making me a little bit nervous because for the last few years, my ovulation temperature has consistently been 97.8 degrees. I have surpassed that temperature 5-6 times over the past 3 weeks, with a drop the next day or so. I use the FAM along with herbal birth control and am I'm concerned that I might ovulate without being aware of it due to the differenc in waking body temperature. Has anyone else experienced anything similar?