It isn't normal to feel unconfortable in any way smoking MJ.

Now, one of my buddies has the eye problem like you. Your eyes dry out right? His does. That is normal in some cases. Use some Visine or Clear Eyes after you smoke up to keep those eyes moist. That should take care of it.

A headache too is normal. Was it bad weed you smoked? Like, low quality? I know if I some low quality smoke, or some even pumped full of chemicals, or even if I smoke too much...I get a headache.

Feeling warm, that's a good thing! You should feel warm after you smoke up.

Now the throat tightness. Are you perhaps just thirsty? My mouth gets so dried out sometimes making it difficult to swallow.

If these effects are worrying you, maybe you should consider vaporizing your herb, or quitting altogether. It doesn't sound like you're having a pleasent experience smoking up, so why continue. Good luck.