Been sick since sept 17th

My two kids (5yo and 10mo) and I have been sick with cold like symptoms since around September 17th. We’ve been to urgent care twice. They said at first it was allergies or maybe a viral infection. Then the second time they said my oldest son had a little fluid built up in his lungs. Gave him a nebulizer and liquid steroid.

It’s now October 10th, and we are STILL sick. I figured I would be sick for awhile due to neutropenia anyway, but my other two are usually only sick for up to three days. They’ve never been sick this long. My oldest can still smell. But I can’t. I’ve taken 3 ronuh nineteen tests. All negative. I had it before and tested positive December 2022. But that’s apparently not what we have now.

Today was a little more easier than the last two weeks, but we all keep coughing.

I’m so tired of all the snot. 😭and I’m tired in general, as my 10mo is refusing naps and constantly wakes himself up due to coughing or if my oldest or myself cough it wakes him up.

Anyone know any remedies or things that would help?