Mona, the health of a newborn cannot be left to the opinions of people on Yahoo Answers. It is just too important.
Your baby had an ok birthweight, but doesn't seem to be gaining. you are doing the right thing by nursing. Does your baby have a doctor? If so, make an appointment so that your doctor can look for anything that might be causing the slow weight gain. Don't put it off. And if you don't have a doctor, speak to the hospital or midwife that delivered your baby. They will be able to help you find a doctor.