This common experience may be characterized by a runny nose, sneezing, and postnasal drip. You could feel extra stuffy during the fourth month of pregnancy. You'll also want to reach out to your doctor if your heartburn is waking you up at night, you have trouble swallowing, or you’re concerned about any other health issue. Don’t take an antacid without speaking to your doctor first, as some may be unsafe for pregnancy, and other medications may be available. To help ease heartburn, try eating smaller meals throughout the day, cutting back on spicy and greasy foods, and avoiding lying down right after eating. Heartburn, a burning sensation in the chest behind the breastbone, can be common at this point in your pregnancy. At 4 months pregnant, what might you be experiencing? Heartburn Let’s explore some of the exciting ways your body and baby are changing as you reach this next milestone in your pregnancy journey. You may also begin to notice one of the more pleasant mom-to-be experiences-a radiant pregnancy glow. Morning sickness may be subsiding, but you may start to experience heartburn and some nasal congestion. At 4 months pregnant, you’re now in your second trimester, and many women consider this trimester the most comfortable of the three.