as far as i know sharp pains arent associated with miscarriage (i could be wrong though) they are more likely to do with the round ligaments. i had these when i was moving from sitting down to standing up and rolling over in bed etc. its from them stretching and the hormones while pregnant.

i also had some period cramping but it was not extreme, just the mild feeling you get a few days before your period is due.

hope everything is alright, try to relax (hard i know) but try and think positively!