4weeks getting sick

Hey y’all, so I’m almost 5 weeks and I think I’m getting sick.

I’ve been having a cough for a couple of weeks that’s been slightly getting worse and sometimes makes my chest hurt.

My ears and throat are starting to get itchy.

I have a runny nose and also been waking up to a stuffy nose

As far as I’m concerned, I have no allergies. But I was reading that pregnancy causes your immune system to get lower and that it’s not good to take medication in the first trimester...

What can I take or do? Are there any home remedies or safe medication I can take right now?

Thank you I’m advance