Betta Fish: Does my betta have bent spine?

I bought my betta about a week ago and I noticed later that he swims weirdly. Sometimes he swims on the side and also his spine doesn't look straight to me. Is this normal or his spine is a bit bent? If so, will he be okay or it can be a problem for him to live a happy life? I love him very much, he is so handsome. I own a long finned betta for the first time, so maybe he moves a bit differently because of that. Please share your insights. Thank you!