Is the word oops is used in beginning of a sentence there comma after oops?

You don't need a comma after "oops" at the beginning of a sentence.

Here's why:

* "Oops" is an interjection. It's a short exclamation expressing surprise, regret, or a mistake.

* Interjections are usually followed by an exclamation point. However, if the interjection is used in a more casual way, it's common to follow it with a comma.

* When "oops" starts a sentence, it's acting as a more casual interjection. It's not a strong exclamation, but rather a gentle acknowledgement of a mistake.

Examples:

* Oops, I spilled my coffee. (Comma after "oops" is optional)

* Oops! I forgot my keys. (Exclamation point after "oops" is more common)

So, it's perfectly acceptable to write:

* Oops, I think I lost my phone.