My blood type changes...

[nathan]

That well known source of scientific information, CSI[*] had an episode involving a chimera.

[*] what? you mean infinite resolution holographic video cameras don't exist?

 

[JonnyFive]

You may, of course, be a cephalopod -- they're known for trying to deceive

I... don't have any idea whasdtu youi taking abouto.

Damknjk tentacle;f... makes it hard to tyypeo.

There, I found my typing sticks... I mean... I have fat fingers. Yes. Fingers.

 

[Cuddles]

What you are talking about isn't unknown to biology. Apparently, you are a chimera, that is, a person with more than one set of DNA. The variable expression is probably do to a 'willed' hormonal shift.

As others have said, chimeras do in fact exist. However, if a cell has a certain set of chromosomes, it will always have them no matter how much you "will" anything (genetic engineering aside). It does not matter if different parts of your body have different DNA, if your bone marrow has certain DNA then your bone marrow has certain DNA.

It is also likely that you could survive after deep freezing.