This been happening sense I got pregnant again,it happends 2 or 3 days of the week.I almost feel like ima faint o I start seeing all black.

Yes it may be, it is serious enough that you need to see your doctor.

You need to see your doctor immediately!

This is usually a symptom of PIH. Pregnancy Induced Hypertension. Meaning your blood pressure is too high. It is considered a medical emergency when you are experiencing symptoms. Please seek immediate medical attention.