Shapewear prob..pls help?

i wear this shapewear(from waist to knee length) ..once in a week and stopped it for 2-3 months.. i was wearing the same y'day and was very very uncomfy all the day long..i got rid as soon as i went home from ofc and then started paining in lower abdomen like hell ! it is like pinching pain that comes suddenly and goes in less than 2mins. iwas not able to sit !frequency increased by night and was like hell whole night !! i still have it now but with less frequency ! is this something serious???