very low oil pressure, was it the nitrous?

[fiveohpatrol]

I forgot to add, that also lately, I've been getting alot of blue (oil) smoke on startup. When I re-ringed the motor, I was thinking about having the heads milled so I started taking them apart to go to the machine shop. Then I changed my mind, cause I just wanted to get it finished, and put the heads back together.

I think that I didnt get one of the valve stem seals set down over the head all the way, or they may have just gone bad and thats whats causing the smoke. Is there anyway that the bad seal could be causing the low oil pressure? I wouldnt think so, but just making sure.