Had a IUD removed, started loestrin fe1/20 3wks later. Had bleeding 1day with the brown pills. Nauseated, breast tender, hungry, on pk2, pregnant? Test neg.

Unlikely. Sometimes birth control pills cause pregnancy-like symptoms: nausea, breast tenderness, mood changes, especially in the first 1-3 months. If a pregnancy test was negative, i'd suggest you continue taking it (be sure you're not missing any pills) and see if your period comes when it's supposed to come.
Most likely no. Home pregnancy tests are very accurate when done according to directions. Most likely you are adjusting to the hormones in your new pill. If your symptoms don't improve in a week or two you can retest for pregnancy for reassurance.