BBT Chart Wtf is this????

πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜­πŸ˜­ this is embarrassing can anyone explain why it’s like this? I have missing days because I took 2 different trips out of town and forgot to bring my thermometer with me both times but as soon as I got back I made sure to start again I do it everyday at the same time

but that huge rise from yesterday to the dip from today!!?? I’m so confused.