Greetings on approaching healthcaremagic.com website. I appreciate your choice of online consult. You should take Steam inhalation. Also Keep a Vaproizer ON in your room where you spend most of the day and night time. It will help open the airway and will also possibly reduce irritation and so the cough. Hot fomentation is good technique in home remedies and is natural way to get the muscle sprain treated. You can alternate it with cold compresses. The combination of both makes the treatment even more better for pregnant femaes with any kind of muscle aches. Any salicylic acid containing ointment or gel should be avoided as we categorize it as category C and is usually non-recommended drug. So to be on the safe side I usually recommend Capsaicin Topical to apply on the affected area. Do gargles with Lukewarm water with salt in it. I hope you may get an eventless pregnancy and a normal delivery. Continue consulting at this healthcare forum if you ever need us in future too. Good day and Healthiest Regards