Sex drive is exhausting, maybe reboot flatline would be good?

Hey, I'm going through a similar thing. I don't really go outside much, so I don't experience it too much in this specific sense, but I'm on day 13 at the moment and thoughts keep coming into my head. I've never gotten this far before, so I can't vouch for how much easier things are going to become, but know that I share your pain. As far as I can personally evaluate, this is normal and makes sense, and besides consulting someone professional for therapy, you just need to persevere and break the habit. Like any addiction, sexual addiction is usually caused by or exemplified by a habit. By consistently and intentionally breaking the cycle, you will be able to overcome this, but you must maintain an end goal to motivate yourself and train yourself to maintain the will. Obviously, this is far easier said than done, but keep persisting.
My story during this run is like a really inconsistent graph so far. However, the urges were the absolute worse by day 7 and 8, and passing those milestones now, things have become easier. Not easy, just easier. I'm hoping I can last at the very least until exams are done, and ideally through the whole of November.

Tl;dr, keep persevering. Do not stop. If you fail the challenge, keep trying until you can do it. Don't say to yourself "I failed/relapsed after X amount of days, there must be something wrong with me." That is the absolute worst mindset you can have. Keep trying. You have this vast community of people to share your and other people's stories, and nobody is going to shame you for trying. If anything, we will compliment you for your sheer effort and resilience alone, regardless of the result.
Keep your chin up and keep going.