sudden mood drop? (rant)

at work today, i felt okay but then a coworker (which imo is a bit overbearing but i’m still a bit new, maybe been working there about four weeks?) did something that i can’t remember but iirc took a task i was about to start working on out of my hands. all of a sudden my mood dropped and i felt almost and like i just wanted to curl in myself. it wasn’t even something big but she and a few other coworkers do that a lot and i find myself having to say “no, i can do it! thank you though” or “that’s okay/i’m fine!” to just finish an extremely simple task. while i appreciate their eagerness to help(?) it gets to be a lot personally for some reason.
i work in a cramped pizza place (no indoor seating, just us making food and customers coming in to order/pick up) so we’re always in each other’s space. that’s not a particularly big problem but it doesn’t help hahaha. don’t get me wrong i know i’m overreacting, it’s just hard for me to not get frustrated :,| i’m now a month on a new script, wellbutrin, so it’s helped the depression and to even out my moods but often something will trigger a drop. :shrug:

Maybe it has something to do with being newish?

Depression could explain the sudden drop in mood, since sensitivity is amplified by it. Another possibility could be disappointment.

This ^^ I hate being the new person at work. Making mistakes and not learning "quick enough" definitely feeds into my anxieties.