I have a lot of choking experience. Heimlichs X2 by my husband early on taught me a lot! I learned to take my time, eat small bites, follow with fluid and if solids don't work...stick to liquids such as smoothies, instant breakfast and yes, even the dreaded Ensure and Boost.

As far as "alone" plans...I unfortunately had to do a Heimlich on myself as well. Have someone teach you. I also taught myself to, at the first sign of airway blockage, to stand, bend at the waist and force out all the residual air in my lungs in one mighty "cough blast" (which wasn't mighty at all, but did the trick.)

It sounds to me like the parsley wasn't actually blocking your airway and causing true choking, but rather was stuck and causing a choking sensation. Am I right? I've been through that, too (darned lettuce and spaghetti!) but I found that relaxing and sometimes even sleeping a night would allow my body to work that out by itself.

Believe it or not, I never had aspiration pneumonia. Even I consider that something of a miracle!

Good luck! The most important thing is not to panic.