Slight gap between canine and my 2nd premolars after braces. I'm worried the gap may expand in future. What do I do? (Photos)

For braces I had extraction done. I wore them for a year which closed all gaps. But when my braces were off there was a little gap on my right side between my canine and 2nd premolars. I got my retainers on the 6th day. Even the retainers have a pointed like part on the right side which I think doesn't allow retainers to close that gap. I asked my dentist he said the gap will close once I stop wearing retainers. I'm worried about this gap. Can anyone please suggest me what should I do?

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