Bad pregnancy acne!

Kelley • Married for 5 years and pregnant with baby #1! Good luck to you all!!
I have AWFUL acne! I've always had some acne even though I'm 25 years old and the only thing that worked for me was doxycycline, a antibiotic for bacteria. Now that I'm pregnant I can't take that and along with new acne my old scars are showing horribly due to my light skin and pigment change. I feel so self conscious and hate to even go out. Is there something that could help me? Any advice would be appreciated, thank you.