Is it normal that i've been having such severe memory loss?

You cut your self over a guy u had known for a month.... I wonder how u will handle a divorce.

I don't think the two are related. For one cutting yourself is not ok. I understand it's a release but seriously get help. And two I can't remember what I was saying half way through a sentence. Or like you who I just talked to and about what. Maybe you need to see a doctor for the cutting which might be related due to something more on the lines if depression.

Have you been smoking or huffing anything?

i cut my self for reading this

Self harm is a sign of depression which a LOT of people have. Depression can put you in a dream like state and when you speak to someone you'll walk away not knowing what you said. If you cut yourself, you need medication. If you don't take it now, you'll eventually need to later in life. Don't feel ashamed so much of the population are on these meds.

Also, it could be that you are hyperactive, adhd sort of thing and not paying attention to people speaking to you. The cut thing just could have been to get attention and I don't know how bad the cuts are.

Then of course there is drugs, lack of sleep, etc. etc. This can cause erratic behavior and all of the above.

It's because you don't care who you were talking an hour ago.

Please talk to somebody about this. A professional of some sort. You should talk to a counselor, because cutting isn't something you should be doing to yourself. Self harm is very dangerous, and who the heck know's how you all of a sudden have memory loss like you do. Memory loss could be a sign of many things. It could be a sign of something as major as a tumor to something as minor as stress. You should see a doctor.

I may be wrong, but I'm not sure there's a link between the cutting and your amnesia. Possible causes of short-term amnesia in someone your age include the obvious (head trauma and a brain illness like meningitis). I assume you can rule those out, because you'd either know about it or would very soon know about it.

Do you use any recreational drugs or have you ever been treated for depression? If the answer to that is no the only other thing I can think of is thiamine deficiency (vitamin B1). Most Westernised countries add B1 to processed foods (flour, rice) but it's always better to go for the unprocessed option (like wholemeal). Unless you're anorexic or an alcoholic, one of the few ways of having this deficiency is that your body just doesn't absorb this vitamin.

None of the above is medical advice, by the way - just a few pointers as to why this may be happening. Whether any of it rings true, or none of it seems to help, you should still see a doctor either way.