Whisper "Wait!"

In that moment of clarity you whisper "Wait! Don't move." The pain re-intensifies so you keep blowing on her neck. So far she hasn't moved but that may just be hesitation.

You whisper quickly "I'm not being a perv. I think I really am dying. Something really weird happened and I'm in so much pain that I literally can't think. But doing this takes the edge off for some reason, so please don't move."

You can imagine her face as she thinks about it. "OK, but if you're lying I'm going to get you kicked out of the house and get someone to kick your ass. The only reason I'm even listening is because I can see your dick and it's not hard... or even healthy looking." She pauses for another shiver "Did the weird thing involve something gross with your dick?"

You're learning where you move your lips to get the best results right now. The pain is not even remotely gone, just faded enough you have a human brain again. The more she likes what you do, the more the pain is muted. Muted, not gone? Yes. There's another of those weird gut reactions, but somehow I know that the pain is just being suppressed and not actually fading. Why couldn't you have had this kind of instant feedback when you were a virgin learning how girls tick? ... Wait a minute. That's your proof. You don't need active magic to pay attention to your own body's response.

"I have an idea. I can't do the big proof right now" She scoffs. "It's true! This is what happened when I went too big too early. I have to convince someone first, and then can use it again." Somehow you're pretty sure that skipping the middle step of 'and then have sex with them' is a good idea if you want her to stay put.

"I'm getting really worried about your head. Can we get an ambulance?"

"I'm not worried. If I can fix the big problem then I can fix my own head, and if I can't fix the problem then I'm going to die anyhow."

"You can fix a head wound?" Her lack of faith is as blunt and obvious as the floor you hit.

"Eventually. At least enough to be safe to walk to the hospital."

She turns her head to stare you in the eyes, and then gets pissed off as they start to roll into your head.