Here's my humble opinion:

Be careful before acknowledging any test result from Internet tests. Be that as it may, your concerns about SPD are justifiable, but here are the most important questions of all: Does it bother you? Does it affect your daily functionning? To me, it just sounds like my own adolescence... I had many boring teachers and I'd rather think about something else... don't worry. SPD disorders are far more complex and serious than your case.