Your fears are irrational, there is a lot of information on the internet, the credibility of those information are in the grey and then there are facts which are hard to change because it is based on substantial logic. Here, the logic is the scope of transmission is simply missing. So you were at no risk whatsoever for HIV contraction.
Let us hypothetically assume that your partner was infected at the first place and you fingered her with open wounds on your finger - It would still defy the scope of transmission because there had to be a viral contact with your nervous system, for that the wound had to be absolutely now - live! with out clot formation and so much gapping that it would have been bleeding profusely.
I suppose that was not the case and hence there was no scope of contraction. So, in a nutshell, you're okay.
This answers all of your HIV questions, and if you can think of any more just reread about the 3. You had zero risk and a test would be a waste of time.
HIV is instantly inactivated in air and also in saliva which means it is effectively dead so it can't infect from touching, external rubbing or oral activities. It doesn't matter if you and they were actively bleeding or had cuts at the time either because the HIV is effectively dead.
Only 3 adult risks are the following:
1. unprotected penetrating vaginal with a penis
2. unprotected penetrating anal sex with a penis
3. sharing needles that you inject with. Knowing these 3 are all you need to know to protect yourself against HIV. The situation you describe is a long way from any of these 3.
Even with blood, lactation, cuts, rashes, burns, etc the air or the saliva does not allow inactivated virus to infect from touching, external rubbing or oral activities. Doctors have calculated the risk from what you describe to be less than that of being hit by a meteor, therefore no one will get HIV from what you did in the next 40 years of your life either. The above HIV science is 40 years old and very well established, so no detail that you can add to your encounter will change it from zero risk.
Your understanding is incorrect because it is actually zero risk not low risk. you need to stop interchanging the 2 words as if they meant the same thing. You have never read here that it is low risk so your reading comprehension is being overcome by your anxiety.
You don't have any medical training, don't know how your lymph is supposed to feel or what lymph does, so should not be poking them and irritating them then claiming you have made a lymph diagnosis that has scared you.