My skin suddenly feels stinging and itchy.

My skin was fine until yesterday... I thought it was actually improving since I've been getting regular LDM treatments recently, but when I woke up this morning, washed up, and did my skincare routine, my skin suddenly started stinging like crazy. I followed the exact same routine as usual, too. Now, it's even itchy. I thought it might be due to dryness, so I tried applying more moisturizer, but there was no improvement at all. I suppose my skin barrier has compromised, right? I have a date tomorrow, so I'm worried.

I even feel like I'm catching a cold; it seems like my immune system, not just my skin, has dropped significantly. The change of seasons is tough, too.