Talk to Gynecologist on Pain In Tail Bone Area

My baby is now 3 months old. The problem is that from the 2nd to 3rd month of pregnancy , i face severe pain in my tail bone area, whenever I sit after standing/walking for a while, or getting up after sitting for even 5 minutes. the pain relieves in about 5-6 minutes after changing position. The situation got better after delivery(normal). But faces same problem from last 4-5 weeks. Need some guidance and professional advice before personal visit to doctor. As don't want to take multiple medications as am a bf mother.