My internet is working again since yesterday. Turned out my brother had tried blocking my phone since it was using up his internet at night (just passively receiving notifications I guess since I didn't actually have my phone with me at the time) and somehow blocked my laptop as well. He then proceeded to forget that he had done it for a couple of days while I tried to find a problem with the router (he was at work so didn't see me looking for a solution). So yeah, that's fixed now which is nice.