What to say to therapist re: HIV anxiety

I'm a classic case unfortunately of someone who just can't let it go and am looking for a little bit of advice on what to say to my therapist regarding the anxiety that I've been having for 2 months now after receiving 10 seconds of brief oral sex from a csw.

I tested negative 2 weeks ago at 6 weeks and am going next week at 9 weeks - 1 day.  I've been put on anti-anxiety meds for the first time in my life (I'm 43), can't eat unless I force myself to, don't sleep well and try to reassure myself hourly about the facts and test results but it always seems to creep back up front in my mind.

I'm going next wednesday to a therapist to discuss my issues but I'm not sure what to say except that I can't let it go!

Any advice would be very welcomed.

[Teak]

How about when she gives you the bill for 120 bucks maybe then you can let go.

[dwaa]

They say that some of the truest things are said in jest ... case in point.

I'd love to let it go myself but as hard as I try, I haven't been able to so far so I thought that a therapist might help as has been suggested on Medhelp by others including Dr's.  I just have no idea what she might be able to tell me that I don't already know.