Rollovers do not effect contribution limits in any way. You contributed $1100 to a 401(k), so this effects your $18.5k limit no matter what you do next (rollover, leave it in the 401(k), take a taxable distribution, etc), but not your $5.5k limit.
You are limited to a single indirect rollover per year (you take the distribution then contribute to your IRA as a rollover), and it must be completed within 60 days, so it might be best to complete a trustee to trustee rollover (the 401(k) administrator sends a check directly to the IRA administrator and you never touch the money). The easiest way to handle this is likely to be to get the IRA administrator to help you as they have the incentive to get it moved over, but you may need someone at your former employer to sign off saying you've separated from service.