Back pain on left side of body?

See photo. I'm 36 weeks pregnant and just started having bad back pain for the past 4-5 days. The pain is in the areas of the photo except on my left side. I've read about sacroiliac joint pain and everything seems to match. Has anyone else had these issues and is there anything I could do to help? It hurts when I walk on my left leg, try to get out of bed, get up from sitting and try to walk, etc. and I plan to keep working full time until I go into labor. I feel stupid walking around work with a limp cause I have like 150 co-workers and everyone keeps asking if I'm OK. :(