I Need Help.

So i have been lucid dreaming for 2 years now. 3 Week ago something strange happened and keeps happening everynight now, even nights if i dont lucid dream, i see the same thing as dream but worse.

I started to sleep and suddenly find myself in the middle of nowhere, a kingdom that looks a lot like the camelot we saw in the tv series merlin. But the thing is its like my second life, i feel like i lived inside there for 16 years. I dont remember it in real life but i remember it in my dreams, i remember falling in love with a girl that i cant remember now but i can in my dream. Its like a real life, an alternative life, i know it sounds crazy but i wouldnt even believe myself if i have been told that i was gonna have 2 parallel lives 4 weeks ago.

Anyways the thing i need help about, something even more strange happened. A shadowy figure started appearing 3 days ago. And last night that shadowy figure came to me as i was riding a horse with one of the knights in the dream. He was teaching me how to ride it but after like 3-5 minute that i was on horse the figure appeared and started running towards me, punched me and my nose bleed, i was scared, the knight suddenly created a icebag outa no where and i but it on my nose then started thinking my bed then i woke up at 3 am. My nose was bleeding in real life. It scared the shit outa me. I checked the wall if i hit my head there and there wasnt anything. I am wondering what if i get stabed by same figure? Would i die? I am scared to get in here and the thing is i am starting to lose control of my dreams.

Thats why i need help have anyone get through something similar? How did you get rid of it? How can i return to my peacefull lucid dreaming or How to COMPLETLY stop lucid dreaming cause i cant control it.