Good - don't trust visual exams if they end up in an STD diagnosis, with maybe the exception of genital warts. A vaginal fissure is also pretty clear.
When you get the blood test done, ask for a type specific, IgG herpes blood test. Make sure it's that. Anything else is pointless in regards to herpes testing. Also ask for a syphilis test, though I don't think this is syphilis by any means, and I'd be surprised if you have it - just good to get that done. (If you are self-paying, and money is a factor, you can likely skip the syphilis test. It's not common, and you don't have a lot of risk.)
Has your partner been tested for anything? Is this your only partner? Are you his only partner? If so, then the only thing you have to worry about is perhaps genital herpes type 1 if he has it orally. (I'm sorry - I'm not totally clear on your risks here.)
Hang in there.
Vaginal fissures can be caused by many things, including sex. I'm not sure why you think it's herpes. Did your gyno mention herpes? If he thought it was suspicious, he would have mentioned it.
I've read over some of your previous posts. I totally get regretting things you've done (I mean - who doesn't?), but please keep in mind that guilt does not equal risk, and exposure doesn't equal transmission, and perhaps most important, STDs don't equal punishment.
I haven't read all your posts, but it sounds like you have some sexual activity with someone you are dating, and then you proceed to beat yourself up about it.(I may have missed some things in there, and I'm sorry.) I'm not sure why. Some people feel they should wait until marriage, and that's fine, but doing otherwise doesn't make you stupid. It certainly doesn't mean you deserve some kind of punishment.
STDs are biological processes. They aren't moral judgements. If you think of STDs as infections like strep throat, and take the sex part out, they aren't dirty or gross or punishments. The only difference is the mode of transmission. I got herpes in a long-term serious relationship. Some get it from casual partners. Some get it when their partners cheat. None of it is punishment. It just IS.
I noticed in another thread in a different forum that specialmom recommended counseling. I totally back that up. If you have concerns that these fissures you are experiencing are part of a bigger problem, follow up with your doctor. Use lube during sexual activity, or abstain until you are ready for it (and it's OKAY if you aren't ready, even if you are 50 years old - there is no time table here, you are ready when you are ready).
Just be easier on yourself. How would you talk to your best friend if she were experiencing these things? Talk to yourself the same way. You aren't stupid. You are human and just need to work through some things. Be kinder to yourself. <3