Bitcoin ABC has most likely "corrupted" your bitcoin datadir (ie. blocks and chainstate folders etC) by filling it full of Bitcoin Cash data... as the devs were idiots and just configured it to use the same default data paths as Bitcoin Core
Your only real solution at this point is to configure Bitcoin ABC to use a different datadir (start with -datadir="Some/other/path" commandline argument) so that it uses it's own directory for BCH blocks... then backup your wallet.dat's and remove everything from the original datadir and then re-sync your bitcoin client.