That rim won't fail suddenly. Check it after each ride. If no significant change, ride it again. Meanwhile line up the replacement.

You didn't say who built that wheel. At your weight, you want a very high quality build; with correct and very even spoke tensions. Another factor that will help is butted spokes. You might see if going with a 13 gauge butted spoke would work in your hub or even boring out for 13 gauge if needed (assuming lots of flange material outside the holes and someone you trust doing the drilling and cleanup with quality, sharp tools).

Getting all that in order in your city of Athens before your current wheel gives up might be a challenge. An easier approach would be to order some DT 14-15 butted spokes (2.0-1.8) and rebuild your hub with a new rim and those butted spokes. (These light spokes might seem a step back at your weight but they are actually both stronger and more forgiving for the rim since there is more stretch.) WHile you are riding that new build, you might start doing the homework on the 13 gauge spokes (sorry, I do not know the metric eqivalent to 13 gauge, 2.2?) and if the hub will need to be drilled and who could do it.

Ben