Erm...it could have been, I've read somewhere that 2/3 pregnancies end before the mother even knew she was pregnant at all.
But then again, it may just have been a late period. I think thats the best way to look at it anyway, it will just be upsetting if you believe that you did have a miscarriage, and the truth is you will never know for definate.
It's best not to dwell on it and talk to your boyfriend about what he wants babywise

he might feel ready too. If not, you can have fun planning it for the future
good luck xx