Blanket thief and low bbt

Shayla • Wishing for rainbows🌧🌧🌧🌧🌈

My boyfriend is a thief of my heart and also all of my blankets! We sleep with a fan on by the window for fresh air. I notice at times I wake up blanketless and absolutely freezing and it seems to reflect on my bbt, any suggestions? Does it effect my bbt? Should I buy MORE blankets (cause I wouldnt mind lmao).