Hurt myself at work, but I feel guilty taking time off 😨

So, I hurt my back at work today, luckily my employer has really great work place health and safety responses. I was sent to see a physio, and he said I have most likely sprained a few of my vertebrae. (ouch!)

My partner and my sister have both told me to take the next few days off, and I know I should, but my boss has been in hospital for the last few days. I feel so bad adding to her stress, there are only three other people who work in our store, and finding cover at short notice is a nightmare.

I feel guilty, because I am pretty sure my boss will come into work if none of the other staff will cover me, even though she is sick. I guess I am just frustrated, because while my back does hurt it's fine, so long as I don't pick anything up, bend over too far or twist around. (so, only really okay if I stand pretty much still.)

Please tell me I am being stupid! I need to rest, so I am fit and we'll for when bubs arrives, I don't want to have a newborn and a back injury! I just hate being an inconvenience to other people!