Pregnancy like symptoms but negative pt

Hello. Dumadami po acne ko. No menstruation for 12 days but negative pt for 3 tests na. Occasionally sumasakit po puson ko. Minsan pag di nakakain on time nahihilo ako, and after kumain parang nasusuka. Taking daphne po and a breastfeeding mom. Can't go see an ob yet. Baka may same sakin dito ano po diagnosis sa inyo? Thank you!