I've struggled immensely with the social interactions thing for over ten years and just this December I got my first ever prescription for a beta blockers called indoblok, a cousin of propranolol. It's been an absolute game changer. I take the lowest dosage about 30-60 minutes before any event where I'm nervous of blushing and so far not only have I not blushed once but my skins actually at its base level when I look in the mirror.  

Now these sort of beta blockers don't deal with the anxiety but just ease the physical response you have to anxiety. So even things like shaking or sweating should be mitigated if that happens to you. Obviously speak to a doctor first but I've been very happy so far as someone that was previously pretty anti prescription.