Anxious about FFN result (29 weeks 3 days)

Last night, I got a phone call from my OB's office that the fetal fibronectin test came back negative (this test is supposed to determine whether preterm labor could occur in the next 2 weeks), but this morning, I got a call from the OB's office saying that it is actually positive and there was some miscommunication. Yesterday, my OB said I should definitely stop working at the end of week 31/beginning of week 32 which would be 2 weeks from this Friday. Before then, it would be up to me. However, that may change now b/c of the results of the FFN. The OB I talked to said that this doesn't necessarily mean preterm labor will occur. I'm still really anxious and I may have to stop working sooner - I'm hoping that my OB calls to let me know if she wants to change her opinion on when to stop working. I will stop working sooner if it would mean delaying labor - I really want to make it to 36 weeks.