First, if you post here in the future, and this is very important, please be as discreet as possible in your choice of language when/if describing intimate issues. It's not because of any prudishness or anything like that but because here in the DID community a lot of us have very sensitive triggers and just seeing those words can really ruin someone's day. (Like trip to the ER ruin. It's serious for some people.)

Secondly, just know that no one here is qualified to tell you what, if anything, is wrong with you. We could all take guesses but if you continue to feel out of sorts, please seek medical attention asap. Call your doctor, go the ER, if you're not sure what to do, call a helpline in your area (the phone book or a simple internet search should help you find the right number) and they should be able to direct you to where you need to go. The one in my area helped me out a lot when I needed it and it actually changed the direction of my life for the better.

Going by similar experiences I've had in the past, the lack of emotion you talk about could be as simple as a result of overloading your liver and/or emotions. It sounds like you've had a rough couple of days. Try to be kind to yourself. In terms of disorders, anhedonia can be a symptom of any numbers of different mood disorders, schizophrenia, etc.

In light of your age, if you think you might be suffering from a mental disorder, I recommend getting evaluated asap. I began exhibiting symptoms at 18-19 years old and put off getting help for another decade and now wish I had done it sooner. I pretty much lost a whole decade b/c I listened to the people in denial around me instead of my own instinct.

The evaluation process as I've experienced it is usually a two or three part interview with a therapist or clinician who will ask you a long list of questions from which they will formulate a preliminary diagnosis, and if necessary, set up a course of treatment from there. The preliminary diagnosis maybe be only the tip of the iceberg but one has to start somewhere.

I hope this helps and if you feel overwhelmed, try breathing deeply (sounds simple but it works) and get help if you feel you can't bring yourself back. If you can't use the phone, try to find a person to help you. Substance abuse is not a safe distraction and take it from someone who knows, it will only prolong your pain and complicate your situation.