Will cold weather affect BBT?

We have had sudden snow here and my bbt just dropped. Actually I temped once when I woke around 4.45am and it was way low ( 96.23, lower temp ever). I’m supposed to start my period on 11th as per glow but I haven’t. I’m anxious if AF is coming because I’ve been TTC and had weird cramping all week long! ( I don’t cramp even during my periods )