had a fuel pump leak on my sbc 350. it was leaking at the part that bolts to the block. replaced it and the fuel line. drove it around and it worked well with no leaks. next day went for a drive and my oil pressure gauge starting bouncing from 38 to 20 and back again. everytime i came to a stop it went to 20 then back up to 38. got home and let the engine cool. Checked the oil and it smells like it has gas in it. Did I somehow do serious damage to my engine? What caused this to happen and how do i fix it.