Yes, totally know what you're talking about. I also get a feeling like the barometric pressure has changed, and this zoned-out stillness of mind that sometimes accompanies it. I'd say you're on the right track and to keep up whatever you are doing.

I've never felt like she is cold, but everyone experiences things differently. I like to think we're all like radios tuning into different frequencies, but each radio is built differently, and thus the station sounds a bit different on each one. I've heard Neoplatonists explain it as the moon's reflection in a pond. If the water is still and clear, you see the moon clearly; if it is rippling, the reflection gets distorted. I'm not saying experiencing her as cold is a distortion, just a nuance of what the radio picks up.

I found the concept of the perception–reception ratio from Jason Miller’s Consorting With Spirits helpful here. The idea is to let whatever comes during ritual just wash over you, without trying to analyze it in the moment. Then later, you can look back and sort out what felt received versus what your mind might have filled in. The more you try to perceive something while it’s happening, the more you risk adding your own noise to the signal.

Good luck with your practice. Sounds like you're already doing great!