Can I go 3 weeks without finasteride or should I try to get temporary fin elsewhere?

UPS is fucking me over, I’m currently on day 13 of no finasteride and my order has taken 34 days and counting to deliver. The expected delivery keeps getting pushed back. It’s never taken more than 7 days so I thought 20 doses was good enough as a safeguard until my next delivery, guess not. Idk where else to get finasteride quick