Withdrawals from cocaine

I don't know whats going on with me, but I'm showing every symptom of a withdrawal from cocaine.

Now, I didn't believe it was possible to have withdrawals without being an addict.

I rarely use coke. I used to use it a lot in my past when I had just turned 16 and everything, but eventually got off of it. I have used it last November once(one line) and once last weekend(a couple of lines) and once the weekend before(one line). I don't do it much. I can easily control things.

Throughout the past 3 weeks or so, I've been falling into a depression. This is very rare for me. I'm always a bubbly happy person.

Within these past two weeks of using it, I've had a lot of pain in my nose and throat (which the reason is obvious), so I decided to stop (which has always been easy.)

Within the past week, everything has gotten worse. I find myself isolated a lot(thought I'm not meaning to), depressed, lonely, anxious, I rarely have cravings, but in this past week I have had extreme cravings to use a needle to shoot it up (I usually only snort it), I've found myself feeling suicidal when I'm alone, I have a lot of discomfort in my stomach, I believe I am developing an eating disorder...

Nothing has changed in this past week with my use except for me telling myself that I'm going to stop. I don't usually use it during the week and I'm continueing not to use it during the week.

I don't exactly know what is going on, but it seems like a withdrawal. Is that possible? Or is it just depression just creeping up on me and I'm trying to cope with using more drugs?