iud appointment in a few days…very nervous

(f20) i’ve always struggled with anxiety and i need some clarity on this…. any person who has had iud or has one can you please let me know if it’s really worth it. i need to know if it’s really as bad as people say…i have a boyfriend and don’t want kids anytime soon. i also have the worst period cramps imaginable. could someone please please tell me the pros and cons if possible i really appreciate it.