This is one of the annoying little traits of dipstix!
That and the fact it can be difficult to assess
A couple of things to check, are the dipstix in date and following the timings stated on the tube before reading, have they been left open or any possibility that cross contamination could occur and is it a fresh (clean catch) sample of urine you are testing? If the stix have been open for some time they can begin to change colours just in the air!
If these can all be ruled out it would be worth checking with your day unit to test your urine for a PCR. This means Protein Creatinine Ratio and is a good bench mark for what might be going on...or not as the case maybe. Dipstix can be misleading as one can never be sure if the +1 is nearer the 'trace' or the +2 the measuring guidelines...and the PCR will clarify this very easily.
I hope this helps.
Every Woman is entitled to understand what happened in her pregnancy when pre eclampsia strikes. I hope to be able to support that process.