Shiny, red patches on outer foreskin/shaft of penis (pics attached)

[buejay]

I discovered these small red bumps/spots on my penis almost 2 weeks ago. They have a shiny looking surface, and when I stretch out the skin, it looks like there may be a 'crack' in the centre. They're not painful or itchy at all. They seem to fluctuate between appearing bright and more dull..possibly flared again after showering and/or masturbating but I used lots of lotion. I've never had penetrative sex before, but have had skin contact around the genital region as well as oral sex - the last time being 4 months ago. I posted this to the herpes community and the responder said it didn't look like herpes. I think I've had the same spots (or similar) recently but they cleared up within 3-4 days.

3 days:
https://anonimag.es/i/09da3084c11303925105da2d846c507c.jpg
12 days:
https://anonimag.es/i/042deba8ee352b74f4c3b6926ea7affd.jpg
https://anonimag.es/i/6f8cac94383d281d036e4bdac44bfd9b.jpg
https://anonimag.es/i/b2b6c940f28511de1d46f3f21e59ca79.jpg
https://anonimag.es/i/aeccae97e3088e188812d04fa03f27e7.jpg

Do you think it could be STD related or maybe psoriasis e.t.c.? Is it worth seeing a doctor? I just saw my Doc recently for another issue so I'm hoping I don't have to shell out another $65 :/
Any help appreciated, thanks.