33 weeks and “crackly” chest

33 weeks pregnant and for the last four days have had a cold which hasn’t improved. No fever, a blocked nose which doesn’t bother me that much, a bit short of breath. The worst thing is the coughing!! Nonproductive cough so think it’s just viral but have such a “crackly” chest but just feel like I’m not moving anything! And in turn from coughing so much I have a constant headache 😓 feeling so run down anyway cause I’m anemic and having iron infusions for that.

At what point do you go to the doctors with a cold? And any home remedies to miraculously cure me? 😂