Be sure to have ample free disk space. Can you pin down a specific clip, effect or transition that may be causing the issue?
Save the project, then isolate and export just the area where it's hanging. Does it still hang at the same spot? If so, share that part of the project, as follows...
1. With just that problematic segment on the timeline, click the FILE menu. Then SAVE PORTABLE PROJECT AS. Save to any convenient folder.
2. Open the folder that contains the saved files and ZIP them all.
3. Upload the zip file to DropBox, Google Drive, MS OneDrive or the like. It's free.
4. Make the uploaded file public (share it) and copy the shared link.
5. Paste the link into this forum.