No problem, happy to help.
I went back and listened to the track again and see (hear?) what you mean. The bassline and one of the other instruments going back and forth certainly convey a pounding headache.
The reason I think it doesn't quite fit is that the track is too aggressive and 'driven' for a moment where Alex is in a state of complete idleness. To me he seems to be continuing in the same state he has existed in for years with a "familiar dull headache". Maybe the music can intensify once Alex describes the "rapidly increasing pain" in his skull.
I don't want to be too much of an armchair composer for your game but I thought it was worth mentioning given how important the opening of a game is.