Rash in 1st trimester

Sarah • Smiles are contagious! :o) Mommy of two under two. 💜💙
So I woke up this morning with a nasty itchy rash in front of and behind both armpits, but not actually IN the armpit. What the heck!?! Going to the doc tomorrow to find out what it is. No Bueno! Anyone else have this problem?