I keep forgetting things and I am worried if this is normal.26F

Hey guys hope you guys are doing well.
I dont know who to speak about this to so ive come to seek some advice or any say from y'all here.
I keep forgetting alot of stuff these days, important stuff like appointments and small stuff like 'you forgot to bring that to me after i asked you to' and this specifically happened 3 times in 2 hours today which made me upset and i am writing this.
This used to happened when i was studying in uni and i was 22 i think but these past few weeks it got worse and it was a part of what costed me a job that i started since my coworkers resented me (they were terrible people thats another story) but this used to trigger them even more.
I dont know if its normal or shall i get tested (i dont know for what). Shall i keep a planner , i usually dont so it will be hard at first.

Can anyone share some insights :).
Thank you strangers