i wouldnt say our younger boy had "anxiety" issues, but in his younger years there were multiple times when his reactions to situations were "over the top"
my mom radar went off, several times, to be sure.
if i can give you one bit of advice, it would be this.
think the BEST of your son. always. think the BEST of him. he means well, he wants to do well, he thinks well, he is well...etc etc etc. this may sound like an obvious point, but his "anxiety" may try your patience on occasion, and shake that knowledge.
im not saying not to get professional advice/support/help. but, no one will love your son more than you.
in my experience, our boy ended up growing "out" of his over-reactions. maturity took its role in his reasoning abilities, it just came later and differently than it did for others.
now, that son is REMARKABLY street-wise and, in all humility, very much in-tune with what really matters. he doesnt have much interest in peer pressure and he has an insight on things that i, as an adult, admire.
if he were the same thinker in his formative years as the "norm", then who knows if he would be that out-of-box thinker that he is today.
i hope this helps you.