<human>: Summarize the given text in a few sentences.

Every bag-checker's nightmare was made real for me yesterday. My luggage did not turn up in Paris after I debarked an Aeroflot flight from Washington Dulles to Paris CDG via Moscow SVO. I could use advice on how to handle this situation - see additional details below and thanks in advance!

I scheduled a last-minute, 3-week trip to France to stay with a friend. It's my first time in Europe. 

I booked with my Amex through a 3rd party (Vayama/ Kayak) with Aeroflot because of the cheap price. I intended to carry my bag on the plane, but a gate agent informed me my bag was too large and needed to be checked at the gate.

I didn't put up much of a fight, and she prepared the proper tags, ensuring me that I would reclaim the bag at the Paris baggage claim. I left my bag with an attendant at the entrance to the plane, who confirmed I was leaving it at the right spot (similar to how you do it on any domestic flight). That was the last time I saw my bag. 

I arrived in Moscow for a 6-hour layover and then in Paris after a short second flight. My bag did not turn up on the belt, and I received help from an Aeroflot attendant at baggage claim. I completed a lost baggage report and was told that most bags were found within 48 hours. 

I made it to my friend's place in one piece but feeling uncomfortable. I have my toiletries and valuables, but my luggage contained all my clothes for 3 weeks in France - estimated value around 3,700 USD. 

Today I had trouble connecting with the Aeroflot reps, but when I was finally able to make it through they informed me that my bag was not found in Paris CDG. They will begin searching the Moscow SVO lost and found tomorrow, which isn't a hopeful update. 

Any advice? Has anyone experienced this before? Thanks!
<bot>: My luggage for 3-weeks in France was lost on an Aeroflot flight from Washington to Paris. Looking for advice on how to handle my situation.