Can you have anxiety and not know what your anxious about

Hi its codymama
I feel allthe time this overall feeling that is not right.  I usually don't go in full blown attacks.
Its just an uneasiess way I feel.My husband will ask me what I am anxious about and I will respond with I don't know .  He will then say then why are you anxious?  Nothing gets my husband anxious or he can hide it very well.  Does anyone else feel this way?
Becky