Anyone one else have less patience lately? ?

I just need to vent. Normally I have a boatload of patience. I've gotten comments that I have too much patience. Lately, maybe over the last 3 weeks, I feel like I'm running low. I'm snapping at people I'd usually be okay with and crying over things I'd normally just take care of myself. How's everyone else holding up? Anyone else going through the same thing?

My reoccurring dilemma:

I'm an essential worker living at home with my parents and 21 year old sister. I can honestly say, my sister and I, we normally get along great! She's been there for me in times no one else was and somehow that fact makes me feel more guilty for losing my patience at her. Her cat had kittens 5 wks ago. We all wanted 1 litter of kittens so it's all unexpected timing but over all wanted. 

I have a new found passion for animals so I've been on top of the needs and checking off milestones. At first I was fine. No stress with the fact that she wasn't helping much and when she did she needed to be nagged. I hate bugging her to help me because I feel like she's done a lot for me and I don't want to have a bad relationship with her. Now in 5 wks, I'm losing my patience. I'm finding myself repeatedly trying to ask her to clear the litter box and pick up their food only for her to say " I don't remember that" Aghhh! I do everything else and if I was home I'd do it all but she can't seem to do simple things. Normally I'd just work around her but lately I'm freaking out. 

Anyway, stay safe everyone!