You need to check things out the old fashioned way and check the oil with your dip stick. You should have done this before putting the two quarts in. If you are not blowing tons of blue smoke or leaving puddles where you park, you are probably fine. Make sure you also know the difference betweeen low oil level and low oil pressure. Check your manual if confused. If your level is fine and you are getting low oil level, then you need to check the connection on the sensor which is located on the passenger side of the oil pan sump or replace the sensor. If you have low oil pressure this can be serious and you should not be driving it.