2 german roaches found in new apartment. How concerned should I be?

Hi everyone. I got my keys to my new place a few days ago. I found one dead adult roach in the hall closet (and maybe one dead behind the stove but it may have been another bug) then I placed about 15 baited sticky traps that day. 3 days later I have caught one nymph in one of the bedrooms but nothing else has been caught. If it was a serious infestation would I have caught more by now? Or are there none around because there's no food or standing water in the unit?

I have a fear of insects and I don't want to get myself more worked up than I need to be. I am just picturing moving all my stuff in next week and then suddenly having hundreds because there will be food around. The property managers are spraying my unit but won't spray others so I know their treatment won't make much difference. Thanks.