My girlfriend flinches and constantly apologizes?

I've been dating this girl for 4 months and some things in her behavior bother me. Like sometimes when I make a sudden movement close to her or put my hand on her back unexpectedly she flinches. Also she constantly apologizes about the smallest things and of things that are not even her fault. Like few days ago I asked her to bring orange juice and a few other things from the shop and when she got to my place I just asked where the juice was and she just got almost hysterical saying "I'm sorry" "I'm so so sorry" "I'll go get it now" "this won't happen again I promise" I just told her it was completely fine and that we would get it the next day but she seemed so shocked by it. I don't know what to think. Do I straight up ask her or what?
My girlfriend flinches and constantly apologizes?
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