possibly because you past your limits, exhausted or dehydrated.
It means you have been working really hard and past your limits.
criying
Eat small meals during the day. You can exercise when you are pregnant as well. You can walk, swim, and ride a bike. Exercising is good for you and your baby. Just do not raise your heart rate extremely high or if you feel dizzy or out of breath, stop exercising.
my girlfriend feel tired and sick
The acrobats may feel dizzy from performing high-flying stunts, while the swings themselves do not experience dizziness. Dizziness in acrobats can be caused by spinning or flipping rapidly in the air, which can disrupt their sense of balance.
A person with low hemoglobin may feel dizzy because his blood doesn't have enough oxygen-carrying capacity. The brain requires large amounts of oxygen, and may be the first organ to notice a deficiency.
If I drink too much wine I feel dizzy. Spinning in circles will make you dizzy. I get so dizzy, I see stars!
It is true that high voltage light directly to eyes, can make someone feel dizzy.
Blood pressure.
If you are feeling nauseous, feel dizzy or feel weak you are probaly pregnant.
Fin-tastic!
It can reduce blood pressure which can make you dizzy. As it also heightens the senses, when you get dizzy and then focus on it, the effect of the powerful mind can then make it feel worse.