^^^ This!

This will sound pretty weird, but before you ruin your shorts by sewing pads into it, try putting a thick, feminine napkin (the one's with adhesive wings) over the pad and take it for a ride. If you still have the pain with the added padding, then more padding isn't the solution. Also, if you decide to try new shorts, stay away from shorts that have gel pads rather than chamois as those do not wick the moisture and will cause chaffing.

I have to agree with Stapfam about trying different saddles. And if you are riding a bike that puts you in an upright position, after trying various options, a new bike (road or recumbent) may end up being your final choice. I hope you find a solution and keep up the riding rather than give up because of the discomfort.