As a nurse who has been through this over the (many) years, I would recommend trying to work---(does your employer know what the problem is? why you need the time off?---this can make a big difference, if yes, and supportive, you may be able to relax, or try with them knowing you may need to leave)-----at work no one ever knew; and I look back and am amazed at how well I did my job even during times of extreme stress (with flashbacks, numbness from the waist down, panic, some paranoia...). I learned that if I kept busy, focused on the task at hand, and didn't forget to breathe, it was the rare person who noticed something was amiss. I used (still do at times) the bathroom/sink and handwashing as quick regrouping time (deep breathing quietly, and counting, taking time to wash well) because, well, who can fault a nurse for washing hands? ---don't know if this helps...
There is something about the structure at work that helps, even when things have a strange, sharp, almost surreal look....
When I began, near 40yrs ago, we did not speak of such things...and the meds I needed did not exist...
These days, I am more apt to take a mental health day, and once, in my life (in the past two years) actually did ask my doc. for time off due to PTSD s/s which he granted without a problem----(work asked no questions, but I did hear that there were rumors going about re: why I was off, so someone talked to someone who talked....I just chose to ignore the probing from co-workers, didn't respond...went about my work...it even got to one of the patients...I ignored that too...Later, I did kick myself a bit for not going to the DON to confront her about her failure to maintain my privacy...but...oh well...) There are pros and cons to openness, it can protect you, or you maybe undermined depending on the workplace and the people----no one ever questioned my abilities till I told someone of my problem.
Hang in there, whatever you decide to do. Thoughts with you. ((hug))