Sleep Talk Disorder?

This is quite a serious problem. You should consult with a Doctor, especially who can treat the problem of a sleep disorder or sleep talk problem. 

The key piece of information in your post is that you sleepwalked as a child. What you are experiencing is a form of sleepwalking, but manifesting differently.

Another manifestation - which I suffered from badly for a few years of my life - is night terrors. That's the one where you suddenly leap out of bed in fight-or-flight mode, in the grip of some bizarre, threatening delusion and try to escape or fight off your imagined aggressor. I did some very strange things during those few years. Usually the sufferer has no memory of these episodes (either night terrors or what you're describing) but I actually did recall them in detail afterwards. However, that didn't help me to come to my senses while an attack was going on. Sleep eating falls into the same category. Some people get up in the night and raid the kitchen without any awareness of doing it. Another variant, which I've experienced a handful of times in my life, is the scary one of waking in the night and not knowing where or even who you are. Fortunately, that one only ever lasted a minute or so in my case. Oh, and I sleepwalked too - right into my late teens.

This is usually due to an underlying tendency that gets triggered by something. Stress and anxiety are by far the most important triggers. Maybe you need to look at this. In women, hormonal changes can trigger these attacks too - as in my case. However, you don't say whether you're male or female. Often a significant life change can make the attacks worse too.

The condition is not serious in that it puts your health at risk, but it's clearly not an ideal way to carry on. You should ask for referral to a sleep clinic. I don't know where you are in the world, but if you're in a country where you can't self-refer to a sleep clinic, you need to start with your general practitioner. Unfortunately, the problem here is that the disorder frequently doesn't manifest in the sleep lab - probably because of the sense of security it provides. The treatment of choice is usually one of the drugs of the benzodiazepine group. However, in cases where suppressed anxiety is causing the problem, CBT can also be helpful. It's usually easier to manage in women than it is in men, possibly because it's easier for women in general to admit to feelings of anxiety than it is in men.

On the bright side, it does tend to fade with age. In my case it peaked for a few years around the age of 45, then rapidly declined. I'm 73 now, and as far as I'm aware I haven't actually got out of bed during one of these attacks for quite a few years. I still have regular awakenings several times a week where I start up in the grip of some ridiculous idea, but come to my senses before I can get out of bed. I suppose I'm fortunate in that I've always remembered my adult attacks afterwards. You'd think that I could use this knowledge during an attack, but it doesn't work like that. While the night terror attack is going on - and I understand they could last five minutes or so at their peak - I have no insight at all into what is happening to me.

You need to start the ball rolling and get yourself referred to a sleep specialist. And try not to get too anxious about this, as this will feed back into the condition and make it worse. As a former neuro nu rse I can assure you that this is "only" a sleep disorder and not a sign of mental illness or a brain lesion.