How to get rid of dry cough during early stage of pregnancy?

Hi doctor,

My last period was on 25th February 2020. I have done urine test twice at home and it is positive and I do have other symptoms of pregnancy. I am sure that I am pregnant. Due to Corona situation, I am afraid to get out and do other tests and see the doctor. I do have a dry cough for the last one month and some time with white mucus. Mostly when I eat rice, and spicy food my cough starts. I have called a gynecologist and she told me to have Adovas after lunch and Duvent (Rupatadine 10 mg) after dinner for seven days. After seven days, I called her and told her that I feel a little better but not stopped coughing and she advise me to take Adovas only three times a day. I did and it did not help me at all.

I called her again and she advises Montelukast 10 mg after dinner and its also not working. It has been four days since I took Montelukast and I feel like I need to deep breath when I take it. I have only cough, no fever, no pain, no breathing problem, no headaches, and no running nose. As you know in this Corona situation I cannot go out with a cough to get other tests or see a doctor for my pregnancy advice and lab test. Would you please help me advising good medicine so my cough stops. Other than the above, I am taking Folic Acid 5 mg two times morning and evening as she told me, do I need to take anything else for my pregnancy at this moment. Please help.