I am 15 weeks pregnant they found lots of sugar at my 1st appointment no sugar in my 2nd appointment and very very little in my 3rd..what could that b?

Diet: Do you mean sugar in your urine? Or you took a screening test for diabetes? Sometimes both can be affected by what we've eaten that day. The screening tests typically require a confirmatory test, so that test makes up for fact you may have had higher blood sugar levels when you took the random 1 hour glucose test. If in your urine, talk to doctor about risk factors for diabetes. Good luck!