@shadimubarak Where do you live? I ask because in the US, it's every 3 years of your younger, and an annual is not required. You said you are in college, so I'm going to assume you are in your 20s, but i could be wrong since anyone can be in college. I think it's under 35 or 40 in the US that is every 3 years. So if you are in the US and it hasn't been 3 years, you should be fine for just a refill. I do know, though, that some places can make their own policies, so that could be what it is if you are in the US.
Stopping and going back on in a short period of time like that can in some cases depending on the person cause symptoms like break through bleeding, nausea, and cramps. But it's hard to say if you will experience that since everyone reacts differently to birth control. Since you do use it to avoid pregnancy, you won't be protected afyer the placebo week ends so i would suggest using a back up during the placebo week since you will not be on the hormones after that just to be safe.
Hopefully, your college can get you a pack. But if not, there are online services that can mail in birth control they accept most instances and are at low cost if you don't have insurance or if your insurance, for some reason, is not accepted. You would have to look up what places ship to your area because some places don't have that service.
Again, I'm not sure where you live, so I'm just going to use my country as an example. In the US, some states can't legally send by mail (due to government). But i know that many other countries are less strict, so if you are in another country, you may have a good chance at getting birth control online. It's super easy. You can even ask for the brand you are using, and they will give it to you after you answer a few short questions.