Put a large air cleaner in on high. Beat the couch cushions outside, shake down blankets outside, carpet wash the furniture and carpets. Scrub hvac vents and air handler ducts. Wet wipe your walls and base boards. Clean you dryer vents. Dust is everywhere. Light mop daily with a spray mop.
Change your HVAC filters every month until it gets better. If you don’t have HVAC, get more air cleaners and stay on top filter replacements.