It seems u r suffering from peridontitis .Its one of the most common complaint among
pregnant female patients as the body need more nutrition during this phase you should take good diet rich in Vit c n multivitamin minerals.Deficiency of Vit C leads to gum recession ,loosening ,food deposition .Kindly get scaling done followed by maintainance of oral health,mouth rinse ,gum massage to get healthy gums.