Acne uggghhh (glow my a**)

Kylee • Pregnant with my 4th, lost the 3 previous angels. Due oct 2015
I reached 20 weeks and had great skin and now I have pimples everywhere under my boobs on my boobs,arms everywhere. My skin is really oily, but my face is clear! Driving me crazy. Is this normal when I haven't had it the whole time until now?