Confusing bbt dips in luteal phase


Hi guys! I’ve been charting for the past 3 months now and this month my chart is acting really funny. I’m 12dpo today, and my chart has had 4 dips in it since my luteal phase started. I usually vary a bit in temp in my luteal phases but in this cycle, the dips and rises seem to be getting bigger and bigger! I haven’t changed my routine at all this month, so I don’t know why my temps would be fluctuating that much. Is this normal?

There’s a link to my chart so far this month.