What is my best option in this difficult situation?

I recently bought a cheap car just to get me back and forth to work. Yesterday it broke. It just started chugging, stalling and idling around 500 rpm’s. I did accidentally almost run it out of gas and I thought maybe that was the issue. My fiancé replaced the fuel filter in case junk got in there. It didn’t help at all. It could possibly be the timing chain (which a mechanic said would cost about $400–450 to fix.

So I need advice. I just started a new job and I can’t call in because I have no vehicle. They have no sympathy for that kind of thing. Here are my options:

-Fix my current car for $450. It only cost me $1000 to buy. It has over 170,000 miles on it and it’s a piece of junk. If I fix the problem, something else is likely to break.

-Quit my job and take this car off the road. I really like my job and I’d prefer to have a vehicle.

-Buy/lease a newer car and take out a loan for it. This would mean me working my part time job just to be able to make my car payments and afford the full coverage insurance that it would need. I would also have to come up with the cost of registration, inspection, etc. This money would have to come out of our honeymoon fund.

So those are my options. Every single one has a downfall. Which would you choose? Keep in mind we have less than 3 months before the wedding/honeymoon. And I only have a ride to work for another week. By this time next week I need a solution. Any advice is appreciated! I’m so stressed.