starting day 14.
I've been feeling a little depressed the past few days and I'm not sure why, could it be withdrawal symptoms? 

Wow! Great for you. Hope that feeling lasts for a very long time and carries you through all future challenges. The reality though is a bit more sobering. Don't want to spoil your hopes, but there unfortunately will be struggles that you're going to have to deal with in the future. I remember as a Bachur in Jerusalem, I had times that I felt invincible and my שמירת העינים was perfect even during the summer months, I remember thinking never again will I fall. Well what do you know, I didn't slay the YH just yet, and bit by bit the feeling of "never again" left me and I was back to square one. Real success can't be based on "feeling good" because those feelings don't last forever. They are useful as a tool, to give you fuel to propel you forward and give you חשק to keep on fighting.

You mentioned that you've shared with a lot of people. That's amazing, a great place to start. As DavidT posted, the best thing you can do for yourself is to break out of isolation, that where the YH thrives. Get yourself an accountability partner, or find a Rebbe in your Yeshiva that your comfortable speaking to, preferably one with experience in these matters. If you're interested, try reaching out to Yiftach, he lives there and would be able to give you guidance and Chizuk, like he gave me (over the phone, although I'm sure in real life it's much better). Hatzlacha! Keep on Rocking!

yeah, BH I have a few friends that I'm comfortable sharing with, and one of my רבנים as well, thanks for asking! as for friends on GYE I don't feel comfortable meeting new people through this sort of platform, but that's ok. 
Anyway, day 23!