Alexis Wade , If you have not already tried, go into you settings and toggle back and fourth a few times from speaker and normal. If settings do not change it, you may have to try a factory reset. Link #1 below tells of a few other things you can try before doing a factory reset, reset procedure explained in link #2. Good luck.
I hope this helped you out, if so let me know by pressing the helpful button.
https://www.techwalla.com/articles/how-t...
https://support.t-mobile.com/docs/DOC-27...
crwdns2934105:0crwdne2934105:0
crwdns2934113:0crwdne2934113:0
crwdns2915270:0crwdne2915270:0
crwdns2889612:0crwdne2889612:0
3