So, I loaded my periplasmic extraction to nanodrop (“or the random number generator”, as some other grad students call it) and it estimated DNA concentrations of 60-90 ng/ul!!!!!!. That is alarming because the curves were like real DNA curves. They were not shifted to the right like phenol contaminated samples are, but 260/280 was close to 2 (typical of RNA) instead of 1.8. Read: http://www.nanodrop.com/Library/T042-NanoDrop-Spectrophotometers-Nucleic-Acid-Purity-Ratios.pdf
This is not my gel (it is an RNA extraction gel I found online), but it is very similar to my gel.
At least, RNA contamination is an easier problem than chromosomal DNA contamination.