Hi!
I can't post anything, it says I have posted one in the last 360 seconds, but I didn't.

Hi and welcome to the forum! That is strange I can see you have not posted to get that message,
I only have one idea and that could be because you are using the tor browser, are you using tor? If problem continues start a thread in the meta section and admin or staff maybe able to help. You was getting that message but managed to post this thread? lol