Hi, I've just completed my first unsuccessful IUI cycle. I was naturally disappointed when I got my AF on Monday

Before commencing my next round of injections I was instructed to have a hCG blood test, which came back a 3. I had another blood test today (two days later) and my hCG is now 4, and consequently I can't proceed with injections this cycle

I'm confused about why the hCG level has gone up. Only by one, but it's not at all what I expected. I had thought it was slightly elevated because I had a pregnal shot 8 days after insemination and it could still be in my system, but if this was the case i'd expect it to have gone down after another 48 hours.

Has anyone else ever had very low rising hCG results (and during AF)? Does anyone know what might be going on?