Are there warning signs to look for during the 6th month of pregnancy?

Yes: In late 2nd trimester the usual warning signs are related to preterm labor, fetal well-being, and preeclampsia. These include but are not limited to headaches unrelieved by tylenol/rest, upper abdominal pain, (worsening) nausea/vomiting, vaginal bleeding, regular uterine contractions >4-6 per hour, decreased fetal movement, vision changes, concern as to whether your amniotic membranes ruptured.

6th month: The safest time in pregnancy is the 4th to 6th months or second trimester. The biggest concern is premature labor.