What’s with the curvy lines!?

My temps have always made straight lines with mountain peaks....now they are like rolling hills. I had a miscarriage a month ago, could this still be effecting them? Usually when is about to start I’ll have a straight temp drop, this time it’s curving and AF is due tomorrow but I usually spot 2-3 days before she hits...anddd nothing...not even cramps, except I had that feeling Tuesday that my period was gonna start, it wasn’t cramps, almost like a bloating I guess idk. My luteal phase is between 12-14 days. Any opinions? Should I take a test this morning or wait it out til the weekend and see if AF shows? If I’m pregnant again shouldn’t my temps be higher?