Since you were riding before with no pain, I'm assuming that this is something you can fix by a change in position/yoga/whatever-else-works.

If not, then why not come to the dark side? Recumbents are a lot of fun and help make the "should I sit in my comfy chair or ride my bike?" question much easier to answer ("why not do both?"). And we have cookies.

Just planting the seeds...

Cheers,
Charles