Quickly changing morals and beliefs. Also strange thoughts?

Hello everyone. I would like to first start off that I want serious answers only please. No 'flaming' me or anything. So here we go. For the past few years, or I guess my whole life, I have had a very hard time making any sort of decision. I don't know if that really makes sense to anyone, but I tried. I also will change my core morals, such as what is right and wrong, and really who I am and how I act instantly and frequently, as in I will change all of that sometimes once a day but sometimes up to 3 or 4 times a day. Here's an example. I will wake up and think "Oh well screw the rest of the day, life sucks anyway." Following this at about 12 I will think "Wow I love life!" and be laughing with friends and such. Then at a later time I will suddenly feel angry or hurt for absolutely nothing at all. At each change I will also change who I like and don't like. For example, I have a friend, let's call him Jim. Now, I could think Jim is so cool and want to hangout with him, and this would last until I change who I am. Then, when I become "Wow I love life!" I will think that Jim is a bad person for previously drinking underage, and I will totally shun him. Also, my morals change like, say I think smoking marijuana is bad, I will change this value sometimes many times a day, almost like I can't figure out what I actually believe. Oh and frequently I question God and those sort of things. It is really just a constant battle going on in my head, and it is really driving to a point where I want to just kill myself. I was previously suicidal, about a year or so ago. I went to therapy for a while. That helped a little. I sort of felt like I outgrew a phase more than actually getting over the depression. (BTW the depression was more of a 'no reason' depression.) I mean, I have a great life. Nothing to really worry about at all. Also, if you're still reading this far, I have this terrible anxiety that at all times something incredibly weird will happen such as if I look at a mirror my face will transform into a demon face and it will tell me something. That freaks me out enough to stop me from going into the bathroom. These thoughts even keep me up many nights until about 1 or 2. Actually right now, I am really empty and sad feeling. I also have really twisted thoughts of having sex with my sister and thoughts of holding a gun to certain people's head I don't like, would make me feel so powerful. These thoughts plague me daily and it is driving me insane. I go to the psychiatrist in about a month or so, so hopefully she can help me. If it helps I'm on Adderall XR 30mg every morning and its been great for my ADHD. Also, I do exceptional in school. I pass big tests with flying colors. Just never do any of the homework and hate classwork. Also, I am not in social solitude. I actually have many friends. My closest friend I have known for a few years, and I share everything with her. We've actually dated before but I am not attracted to her like that anymore. She knows all about these feelings and thoughts (except for the lust towards my sister, I refuse to tell anyone that.) anyway, could someone please tell me if they know of a disease this sounds like? Also at around 9-10p.m. I get extremely paranoid and these weird thoughts become magnified. The adderall does not enhance or reduce these feelings and I have had the feelings before I was on adderall so it isn't that. Thanks in advance.