I got laid off when I was 6 months and ran into some old coworkers a few days ago. I said they told…

I got laid off when I was 6 months and ran into some old coworkers a few days ago. I said they told me it was because I wasn't forfilling the job requirements but I had concerns about it being about all the days I was asking off for doctors appointments. Tonight I get a friend request from my old boss. I don't want her trying to clear the air because it won't fix anything and it's not like she's going to hire me back.