OK. First off it takes a fairly significant blow to the head to cause a subdural. I'm talking about the kind of blow that makes one nearly black out or at least be stunned and a little off balance for a short time. So I see no reason to think that you're developing a subdural and the head bonk with your girlfriend is simply incidental and not related to the headache you have now. If your doctor did a full neurological exam--looking in your eyes, reflexes, balance check, etc--and found everything normal then there really isn't anything to worry about. As for progressing symptoms of a subdural--confusion, drowsiness, balance problems, vision problems, nausea and vomiting would be things to look for.
Let me know if we need to discuss this further please
That's nothing to worry about and just so you'll know, once a subdural starts causing a headache, the headache doesn't let up so basically you can put the subdural worry to rest
I would appreciate a rating for my services to you Lee considering all the time I've spent with you. Thanks