I put together a map in QGIS and everything looks good in the composer view, however when I export to PDF, the projection/data seems to have shifted from the Google Open Layers basemap.
I followed the instructions for adding the Google basemap from here: https://maps.cga.harvard.edu/qgis/wkshop/basemap.php
Part of this guide had me change the project CRS to WGS 84 Pseudo Mercator.
Since I was having trouble, I attempted to fix the issue by right-clicking on each layer and changing the CRS to WGS 84 Pseudo Mercator as well. This made it worse. The attached image shows what my PDF looks like at this point.