Welcome to the STD forum. I'll start with congratulations for having safe sex. You were at little or no risk for STD.
Since this is your first sexual exposure, presumably you are young. I have the impression that, like many of today's youth, you have had a biased and frightening form of sex-related education. Although sexual safety is important and STDs (including HIV) are common in one sense, many school-based education programs make the problem seem bigger than it is. Also, they do not sufficiently emphasize the details of how STDs are transmitted. In general, the risk is low or zero if a bare penis (no condom) gets inside someone's vagina or rectum. Even then, the large majority of sexual encounters do not result in any infection.
Statistically, it would be rare for anyone to acquire an STD during his or her first sexual encounter. In any case, you had safe sex. And your symptoms don't suggest any STD. You have an obvious explanation for the penile swelling and irritation: an hour and 40 minutes of masturbation is very long and undoubtedly very irritating. As for your penile skin being "wrinkled", this doesn't sound abnormal at all and certainly cannot result from any STD. My guess is that your anxieties are making you more alert to normal variations in penile skin. And as men age, the penile skin naturally takes on a more mature appearance that can have prominent wrinkes. These changes are common between ages 15 snd 25, and they continue thereafter. (Just glance at older men when you're next to them in public toilets. You'll see quite a difference and quite a lot of variation.)
To your psecific questions:
1) Zero risk for practical purposes. There is nothing here to suggest you have any STD.
2) As I said above, it would be statistically unusual to catch an STD during one's first sexual exposure. Of course it could happen, but not likely with the kinds of exposure you describe.
3) There is nothing here that even hints at herpes. You can't catch HSV-2 by oral sex, only HSV-1. Use the search link to look for symptoms of genital herpes, how it is transmitted, and the differences between HSV-1 and 2; or visit the herpes community forum. But just forget herpes as a cause of your symptoms. No chance.
Like the wrinkles, the small "bumps" are normal. Just sweat or sebaceous glands. Every penis has this. You need to stop examining yourself so closely. Finally, I have no comment about the "weird feeling" during masturbation. It doesn't sound abnormal and certainly not due to any STD.
Here is a thread that explains in detail how STDs are transmitted and why there is little risk without unprotected vaginal or anal sex. Start reading with the follow-up comments that start December 14:
http://www.medhelp.org/posts/show/1119533
Regards-- HHH, MD