Pregnancy test after IUI

Kiersten • TTC #1

I had my first IUI done on 2/7/18 I was told to wait the two weeks and not test early. I had my trigger shot on 2/5/18 and if I tested early I could get a false positive or negative. Aunt Flo was supposed to come 2/19 and hasn’t come and she’s always on time. I took a test today and it came up negative. I have a few pregnancy symptoms. Has anyone else had symptoms and got a negative? Should I request blood test?