Just got a BIAB manicure done, and walking home just noticed gel on my skin. Should I be concerned/attempt to wash it off myself?

Don’t worry too much! The chance of developing an allergy are pretty low and the damage is already done. Gel on skin comes of easily after a shower, so have a little soak and you can just peel/wipe it off. 

I would let the salon know though.. it’s really unprofessional! Do love the art!