I had the same type of rash with my first child, only it was contained to the area right under my nose and above my upper lip. It started about halfway through the pregnancy and unfortunately only got more irritated throughout the pregnancy. No types of creams or ointments made it go away and, like you, makeup only made it look and feel worse. Good news though, if you can tough it out a little longer, it went away almost immediately after giving birth. My doctor said it was probably the hormone levels being so high and after the delivery when they leveled off, it went away. Good luck to you!