Why don't you just rig some stuff up.
For instance, get 2 boom stands, extend them all the way up, with the booms horizontal, as in a T shape.
Now pull the blankets of you bed, and drape them over the T's, placing both stands so as they form a V-shape. Put your mic in the point of the V, and try singing into it like that. I think you'll find that your weird sound will be gone.