Periodontal Disease While Pregnant

Has anyone ever dealt with periodontal disease onset my pregnancy and or pregnancy gingivitis? I believe I may have it. It started out with something stuck in my gum. I got it out and the swelling right there went down immediately, but since then for the past 3 days my gums have been swollen. Now whenever I eat, I get an immense pain near my top back molar. It goes away about 30 mins after eating. I'm reading some dangerous stuff on google and it's terrifying me... does anyone have any info and experiences???? I have a dentist appointment this Wednesday. It was the soonest they could get me in but I'm in seriously SO much pain :(