Teaching during 1st Trimester

I'm a teacher and I can't even function. I'm so tired, nauseous and headaches from both now mix in kids. I'm off my adderall so focusing without it is leaving me in tears. I just can't seem to get it together. Right when I think I'm ok, I get up to just run to the bathroom and throw up.

I love my job and have extreme guilt at how much I just suck as a teacher these days. They deserve better but what am I suppose to do?!? I just want to crawl in a hole and cry.

I'm having a hard time with all of this. I go to the doctor Monday but wow I'm overwhelmed.