Injured tailbone/coccyx

5 weeks ago, I fell skiing and injured my tailbone . I went to the doctor the next day and was in a lot of pain.  X-rays showed a normal coccyx so my doctor said it was either a severe bruise or hairline fracture, no sports for 4 weeks.  Now, at 5 weeks, it's hard for me to sit without my donut cushion, and I"m not nearly as active as I'd like (I'm a cyclist, so it's really important that this area be pain free)

Could having sexual intercourse 2 weeks after my injury have worsened it?  I was in stable positions.

What can I do to speed my healing and/or help the healing process?  Can anyone recommend a type of physical therapy or other treatments?