Welcome to the Forum. there are two thoughts that come to mind as I read your post. I wil share both with you.
First, let's discuss the various symptoms that you've experienced over that past two years. In each case you have a very good alternate explanation for the lesion/sore area that you describe and in each case the lesions you describe do not really sound typical of herpes. In several instances the lesions appeared very soon after having a sexual exposure, this is not typical of HSV which typically occurs 4-10 days after an exposure. In addition, in each case, the lesions you describe really do not sound much like HSV either. Finally, with regard to the lymph node swelling that you experienced, that is not a reason for concern. Lymph node swelling is a non-specific reaction to any number of different irritations and should not lead you to immediately be concerned about HSV.
The second perspective I have on this is what if you do do have HSV. It is not the end of the world and is certainly not something to spend a lot of energy worry about. . The disease is common with HSV-1 being present in over 60% of adults and HSV-2 (the virus which causes most genital herpes) being present in about 1 in 5 Americans. Having herpes, while a concern is very manageable. This is not to say that you shouldn't be concerned about taking steps to avoid HSV but more to try to influence the way that you do this. The proper steps to avoid HSV and, for that matter, all other STDs are several. these include-1. Ask you partner if they have any STDs, including herpes and cold sores. If they do, you need to be extra cautious about condom use, etc. and 2. Use barrier contraceptives, i.e. condoms which are highly effective at preventing transmission of all STDs. While neither of these assures that you might not get HSV or some other STD, they certainly are helpful.
Finally a comment about testing. If you choose to have a type specific blood test to find out if you have had HSV, please remember that for starters, tests are often positive. By that I mean that over 50% of adults have HSV from cold sores and similar problems that they may not even be aware of. Similarly, about 20% of adults have HSV-2 but are unaware of it. Thus if you get tested (and I would not recommend it in your case – low yield and confusing), realize as well that the results will not tell you where your infection is on your body, how long you have had it, or who gave it to you.
I hope my comments help. EWH