You will feel sick.

They can be feeling sick but to my knowlegde they cannot be physically sick. hope this is useful to you!

That is not good. Unless you know you are sick or something, you should go to a doctor to find out why this is happening, as blacking out and feeling really sick are not very normal.

present - am: I am feeling sick.

past - was: I was feeling sick

past participle - been: I have been feeling sick all day

There are no rules for forming the past participle 'been'.

If you are feeling sick and dizzy, you will have a temperature of 37 and above.