@kemaloksuz I’m glad that you’re seeing some improvements after surgery; recovery with nerves especially can take months, even up to a year as @BabzieAM says, so it’s important to be patient and to focus on the positives!
I was warned off having a stent (although I have been very lucky & removing the styloid has been enough to stop the vascular symptoms), as they can cause pain & can’t be removed once in. There are some research papers I think which discuss the pros & cons of doing stenting, the latest one posted by @Chrickychricky is written by some US experts so is worth a read:
New paper by Fargen, Hui and Hepworth, et al - General / Research Papers - Living with Eagle
It’s certainly not something to rush into & if you’re able to get another CT venogram to see if your IJV has opened up after surgery would be worth doing…Normally I’d say have the second side removed & see if that helps, I think waiting a while as you said is worth doing as you have CCI. Some members have not found they feel their neck is any more unstable after surgery, others feel the surgery may have made it worse so see how you feel in a while. Hope that you continue to keep seeing improvements 
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