First iui didn't work

Em

Got my Beta done yesterday.It was my. first round of medicated iui for unexplained fertility. Been ttc natural for 4 years. What I thought was weird is they just told me to trigger whenever the day they called and then come in the next morning for iui. Then I did progestrone suppositories for the 14 days. Got my beta 1.9 and she told me its a gray area. I know its negative but not sure what to do next. Should I 2nd iui?