My gf never really goes down on me anymore. She was trying today, and about 15 seconds into it, looked really flush and had to stop because she said it gave her a headache and she seemed to feel sick for quite a while afterwords. Kept saying she really wanted to, and started crying feeling like she was letting me down for never going down on me, etc. I'm sure I'll get lots of "she's fucking some other guy" or "she's just fucking with you to get out of it" etc, but I really don't think that's the case here. Anyone heard of something like this happening?