Hello, to me of 21 years and I on 16 week of pregnancy. Since yesterday...

[Kim 21 let]

Hello, to me of 21 years and I on 16 week of pregnancy.
Since yesterday at menya pains in the bottom of a stomach or belly and the same part
Sometimes becomes very firm. Whether tell or say please costs or stands to me worries
Or this normal phenomenon.
Thanks

[child]

At any unpleasant and furthermore morbid sensations during pregnancy costs or stands will see to it and to address to the doctor, to avoid bad consequences