I'm dropping behind in college because I constantly worry about non-important issues

I began at college a few weeks back, doing a BTEC in software design and IT development. I've been finding that, especially towards the end of the day, I've been unable to work because all I can think about are mthw things that worry me, and even then these are some of the stupidest things. These are the main things:

Firstly, on Wikipedia (well its sister Commons project, actually), you have the different image licenses, such as the Creative Commons variants and the Public Domain. On top of this, some images have additional restrictions, given in the form of a template, such as trademark rights (logos) and personality rights (photographs containing people), indicated by an orange warning icon on the image preview. While the site is pretty consistent at tagging photos with the trademark template, over half of photos containing people do not contain the personality rights template alongside them, possible because personality rights do not apply in some countries. I get very paranoid over whether a picture of a celebrity does or doesn't have this template tagged with it, even though there is really nothing to worry about, since I have no plan to reuse any of the photos, and seeing the template tagged alongside an image of a celebrity seems to give me a negative impression of them, even though this is nonsense since it's up to the users of Wikipedia to add the template, and in many cases personality rights would apply regardless of the template. I need a way of finding out whether each image does or doesn't contain the template, without actually clicking directly on the page or preview. Possible either through running a script to find if the template code/text is present on a particular URL (the image page) or by looking at the page history to see any sign of a user adding "{{Personality rights}}". Long term I need a way of refraining from clicking these images, and realising that the template is not a problem. I could also block access on my devices to the Commons servers, however this would just mess up Wikipedia and could be easily reverted.

I developed a method on Wikipedia about 3-4 years ago to find out if a page was semi protected, since I had a similar phobia back then, regarding which popular pages were and weren't protected. I type the page name into the special protection log page, then see from the log if it's protected. Works for me.

The second problem relates to being out and about, rather than something I worry about in class. You know those abrasive "UNDER 25?" posters you see in supermarkets and some pubs? I have a real phobia of seeing them. This phobia goes whenever I visit Scotland because the Challenge 25 policy is used everywhere there, but in England, where only some places use C25, I get a hugely unpleasant rush of grief whenever I see this poster, or something similar. I've never minded the C21 posters quite as much.

I really need to get rid of these problems, and others like them, because thinking about them just makes me really miserable at college. These phobias are all I can think about whenever I'm in lesson, and I need a way of just forgetting about them.