How quickly does acyclovir work?

[wwill]

I recently had unprotected vaginal and oral sex with a friend.  The next day she told me she had herpies.  I was floored and overcome with worry.  She told me not to worry and that it wasn't a big deal!  I couldn't believe her response.  Ten days after the encounter, two small red bumps appeared on the shaft of my penis.  I went to the dr the following day and he gave me a blood, urine, and culture test.  I am still waiting for the results.  He also prescribed acyclovir for ten days.  I took the first pill right before I went to sleep.  When I woke up, I checked the progress of the two bumps and they were almost gone. Two days have passed and theyre entirely gone.

My question is this:
Is it possible for acyclovir to work that quickly?
Any info would be greatly appreciated
I am extremely worried that I have herpes

[wwill]

Swab test was warranted and he mentioned that he still thought it wasn't herpes.  I took the test and went on my way.   The very next morning the rash was almost completely gone.   Pretty much all of the redness on the head disappeared with only a little redness on the shaft still there today.  I'm still feeling slight pain and pressure in penis.  I get the results of the swab test tomorrow.
I guess I'm looking for reassurance once again.
Is this herpes?  I really hope it's not!!
If it inst I don't know what could be causing this constant pain  
Thanks in advance

[wwill]

No lube was used
Thanks again for your quick response!
I'm so stressed

[wwill]

The dr also prescribed another round of acyclovir but I didn't take it.  As a previous post mentioned I shouldn't take the medication until I know for sure.  Is that the right course of action at this time?

[gracefromHHP]

use a good lube when you masturbate dear! You have to be kind to the little guy - not irritate him by rubbing your hand over him dry!

[wwill]

That's why I'm so concerned because for so many years it's never been a problem I feel doomed.

[gracefromHHP]

just because it's never been a problem before doesn't mean that your penis isn't more sensitive as of late and you are just further irritating him by not treating him kindly.