This is always happening to me most of the time, I sell my coins when the market is in downtrend especially when I really needed it or emergency purposes. I cannot blame the market but to myself the outcome of my decision. Yes, it is my decision so there is nothing to blame but myself when the time I will regret selling.
You shouldn't regret such decision. You said so yourself, it's an emergency, I don't know what it is for, but for example to save someone's life, or due of a payment or something. Whatever it is, as long as it's an emergency (urgent), or any significance at all don't regret it over money. Why? Money can be earned again and again--life(?) you can't, time(?) you can't.
That's the attitude, remember that there's still opportunities if you are willing to work again with your investment, emergency is emergency you don't have any other options since it's not your desire to use the money but due to urgency you are force by the situations. Take your time to try again and do a much better planning with your invested money, set every portions so incase emergency happen you have other portions of your savings to use.