Ask yourself few questions .
Am i emotionally happy with my life ?
Am i emotionally happy with who i am ?
I find the exact place ,where the stabbing occurs, very peculiar .
Try to think of a moment in which you felt like this way "stabbed " in the heart .Can you recall such moment ?
To me there is possibility that you want to "die" in order to let go old things ,which do not serve you anymore ,and be reborn as new person .However, you maybe not able to let go entirely on your own ,therefore you get involved stranger (someone who is not emotionally attached to you )and your family .
You need to find what exactly is holding you down and heal it ,then you can be reborn and you will not have those dreams anymore .
For any case take under consideration everyone's advice .
Make sure you are always aware of potentially dangerous situations ,for few weeks (till the dream stops ).