When I first started with crystals I was extremely sensitive to the energies. My collection and inventory at home did not bother me, but the first time I went a dealer's warehouse I was completely overwhelmed! I had to keep going outside because my head was spinning, I was dizzy and slightly nauseated too.

I had the same experience the first time I went to Tucson too.

Black tourmaline will help greatly, so will amber. Amber helps you to break the energetic connections. I use amber when I have problems breaking contact with a stone after I have finished a reading for my store.

Your body will adjust to the vibrations of the stones, it will just take time.

Try moving the stones around until you find a comfort zone. You may just have them too concentrated at the moment.

I would keep the rose quartz in you bedroom, and the hematite by your monitor.

You might want to try clearing the stones too if you haven't done so recently. Place them touching the selenite for a few hours, you might have to do it in shifts depending on the size of the selenite.

And if all else fails, tell them they are overwhelming you. Respectively ask them to mute their energies to allow you time to adjust.  

You are just probably not used to them...I have over 100 crystals kept in one room :P