basal temp question

so on Saturday I had a solid smiley on a cb digital opk. I work overnight so I I know I ovulated about 1:30 am Saturday night/sunday morning, I know this because I had severe pain down there like some of my terrible cramps. but my basal dropped this morning not by a whole lot but by quite a bit. I always check before I get out of bed.... why would it drop so much? the only things I'm experiencing that could be completely normal are major indigestion and lots of gas, but again those could just be my keto diet... well not the indigestion as I haven't had it in several months.. could someone help me. is it possible that my basal will rise again or am I out?