Faint positive AND spotting

Secondary unexplained infertility.

after 12 months TTC, I did an IUI this month. I go in for pregnancy bloodwork tomorrow. I took a FRER this morning and got an incredibly faint positive. I had some blood when I wiped this morning. I’m on cd 27 and normally start spotting around cd 26 so was so relieved when I didn’t have blood yet. I was so excited to see the faint positive this morning and was so disappointed by the blood. With my first I didn’t have implantation bleeding or any bleeding during my pregnancy. What a roller coaster of a morning. First response doesn’t have evap lines right?! Ugh anyone have any words of wisdom?