Manufacture Change?

I’m super embarrassed to ask this. But I have been on buspar 5mg 4 times a day for 3 years and it’s been a dream! Anyways I went in to pick up my buspar and I always check to make sure there hasn’t been any changes. But apparently they changed manufactures? So instead of my barrel pill that just say 5mg on it,it now is a an oval pill that says 349 on the back. I’m really worried that my body will notice a difference between this version. I called the pharmacy line and they said that even though in my file it says no substitutions of changes to the pill there is nothing they can do. They said it may have just been a one off so when I go for a refill in 3 months it will be back to my old ones. Has anyone experienced anything like this before? When I was on Prozac ages ago they would constantly change the brands and I did not notice a difference. But I’m nervous because my body has been sensitive with buspar not terrible but definitely sensitive like when I do dose increases it takes about 2 ish months to get over the side effects. I don’t wanna feel like I’m starting over again.