What do you mean by the oxygen level? Do you refer to oxygen pressure or oxygen saturation rate?
If you mean the oxygen pressure, then your value is normal (normal oxygen pressure ranges from 60 mmHg to 80 mmHg).
If you mean the oxygen saturation rate, then your value of 67 is dangerously low. The normal range for the oxygen saturation rate is about 95-99%. If this what you're talking about, then it means that your body lacks oxygen severely. You may have symptoms of shortness of breath or difficulty breathing.