Late Implantation?

I know what the average is for implantation, however Im curious to know if anyone has experience with late implantation?

I had an IUI done on Feb 14, on Feb 28 (14dpo) I had to go in to have a beta done. Well the call came back that it was positive however it was very very low (3.2)

Most Ive read says this is a negative number, and Im not pregnant. The doctors office wants me to come in again on Sat (2 days later so 16dpo) to get a repeat beta done.

I also been told it could be late implantation... or late ovulation since even though they say I likely ovulated on Feb 14 it could've been a day or 2 later.

Would this result in such a low beta number? Im not even sure what to think right now, Im confused and really on an emotional rollercoaster. I just want to know either way!

Please share your experiences
Thanks!!

I have been attempting to track my ovulation, and it could be a late ovulation. For 2 months now, my cycles have been 39 days. Meaning that I have a late ovulation. These ovulation predictor test sometimes suck, cause I never got a test line darker than the control line. Yet.. am ovulating. I would say, cross your fingers.. pray.. and hope for the best. Cause now it is for GOD to decide what happens. I really wish you luck.. and hope you get pregnant soon.. if not this time.. there is always next time :)

In some cases it would have been low but depending on the body its not always going to show a low number.