Hi. Welcome to Healthcaremagic. I read your query. During pregnancy, hormonal changes makes gums and teeth more prone to plaque. This is called Pregnancy gingivitis. Best care is to maintain good oral hygiene. Brush twice daily. Ask your dentist about correct brushing method. Use non alchoholic mouthwash or do warm saline rinses. Avoid sugary or acidic foods. If you have morning sickness and vomit, rinse your mouth after that. Do proper follow up with dentist and get oral prophylaxis. As for wisdom tooth area swelling, symptoms are of pericoronitis. X-rays are usually avoided in pregnancy. But if it bothers more, consult your dentist and physician for an antibiotic course. Warm saline rinses helps. Hope this answer helps. Thank you.