I think it depends on the intent and also the type of chumros. If after taking a long hard look inside yourself it is still out of genuine love or awe of Hashem in the same way that one would l’havdil go the extra mile for one’s father or a beloved ruler then it must be Ok.
But if it’s a case of trying to jump to a spiritual level that you’re not truly yet on like running before you can walk or to try and earn accolades from onlookers then unless it is an accepted custom to keep this chumra then maybe it’s better to steer clear. Some chumros are specifically designated by Chazal as ‘Mechzei K’Yuharo’ i.e. appearing haughty.
Best to ask a Rabbi anyway.