STOP! check engine oil pressure

[04e53x5]

So yesterday I was driving home stopped at a red light right before it turned green the oil
Light started flickering and stop engine oil pressure message popped up and the idle was very low so I held the break and tapped the gas to bump up the rpms and it all went away so I when I started to drive it all went away like it never happened the oil light would flicker and nothing else the whole way home the light would just flicker no messages when I got home I checked the oil and it right around max I let it cool off a little hoping that it was just hot considering the temp was around 90 yesterday when it was relatively cool (temp.needle was by blue) started it up nothing different then any other day so I took it for a drive and absolutely nothing no messages no flickering lights I read it may be the oil pressure switch or the oil pump but there's no exact solution for this people all did different things to solve it any info would help it's a 04 3.0i