Thank you for your query.
Some amount of pain and pressure in the second trimester of pregnancy
This is because the uterus grows out of the pelvis into the abdomen.
The ligaments, nerves and muscles stretch and cause mild discomfort and pain.
also cause pain.
however if you are feeling more than tolerable pain and pressure, it could be the earliest sign of a miscarriage
I think you need to consult your obstetrician who would examine you and let you know if there is any need to worry.