Namasthe Welcome to Healthcare-Magic Greetings of the day I would like to tell you that none of medicine are safe during 1st trimester of pregnancy. Only drug that is advised in 1st trimester is Folic acid, which is given to prevent neural tube defects. In your case i would advise you alternate non pharmacological treatment like 1 steam inhalation: Done for 15 minutes every session, 4 times a day 2. Warm Saline gargling: Add two teaspoon of salt in a glass of lukewarm water and gargle 4 times a day. 3. Boil a cup of milk, add 10 tulsi leaves+ 2 black pepper+ a pinch of ginger+ 1/2 spoon of turmeric powder--- Bring it boil, strain it , drink it hot taking few sips at a time. They will relieve the throat congestion Above remedies are totally safe would suggest you to confirm pregnancy by taking home pregnancy test to be sure In case you need any further assistance, will be glad to assist you. Wishing you happy and healthy life Take Care Best Regards Dr Deepak K K MBBS,MS,MCH