31 weeks pregnant

You can consider a humidifier. I had really bad nose block during pregnancy. I used a diffuser from muji and put essential oils like peppermint in it to help me sleep better. For blocked nose, I also used warm compress on my face. I used the warming eye mask from Watsons. https://www.watsons.com.sg/steam-eye-mask-rose-fragrance/p/BP_70110 If you really want to take medication to help with the itch and blocked nose, chlorpheniramine is safer than decongestants like telfast or zyrtec. I've checked with a GP before and read up on drug safety on my own.