Help ! I think I ate a piece of pistachio shell

I was eating pistachios and I cracked a shell I and put it in my mouth and a part felt hard but I already swallowed it, I don't know if it was sharp but it was probably 1cm size Will my stomach acid disolve it ? Should I go to the ER ? This was about 3 hours ago

31 Male 185 pounds 5 foot 8 No medical history