Suppose I float in a dark part of space (no radiation), after I have been robbed of my spacesuit during a spacewalk. So I'm naked. But I can keep my breath as long as I want. Or better, I'll try to hold my breath. My eyes are tightly closed. Can I stay alive? Will I freeze? Does it help me to move wildly (to generate energy)? Will I survive (until a spacer comes picking me up), must a space ambulance be contacted, or maybe even a bodybag be asked for? Is it even possible that I heat up? Let's not consider the effects of pressure (I like the answer given below, but that's not what I meant. I'm aware that in reality the air will force even my sht out, but let's ignore these shtty effects).

Or maybe better. I'm in a lost space station from which all air has escaped. The power supply is dead. My only protection (from zero pressure) is my pressure suit, which is a perfect heat conductor. I only have a full oxygen tank. tightly connected to my mouth. Will I freeze or will I heat (if I move wildly maybe)? Will I stay or will I go?