No. A loan is not a withdrawal or distribution. You do not get a 1099R for a loan. If you got a 1099R it was not a loan and you need to contact the plan and get it cleared up.
A loan from a 401(k) account is not reported on a tax return and you will not receive a Form 1099-R for the loan. Only if you default on the loan would it become a withdrawal and the amount of the distribution has to be entered as income on a tax return and you would receive a Form 1099-R.
No, a loan isn't considered a distribution. You won't report the loan on your tax return, unless you left your job and were unable to pay back the loan within 90 days, or as @DoninGA mentions, default on the loan.
Here is a helpful article that explains more about the topic An Early Withdrawal From Your 401(k): Understanding the Consequences