when you spot a period!
yes
Its not good to squeeze a spot period
If you have a period than you are not pregnant
You might be starting your period in a couple of days.
yes
I have already had my period and was put on metronidazol and started to spot what does that mean
It would be unusual if didn't have a lot more than a spot.
If it's your starting your period for the first time it means that you should start you real period soon. If you already started your period it could mean nothing. Sometimes due to temperature you spot instead of having your period. This also occurs if your very thin.
yes
why my period is come every week and 3to 4 days.
Yes, it's completely normal to spot before your period - spotting is light bleeding, menstruation normally starts light like this and then gets heavier as it goes on.