It's uncomfortable because some part of it is not what you wanted and perhaps can be avoided.
It's a good signal to u, that there is room for improvement in future handling.
It is also a window of considerations to perhap change the decision.
After that window, do not look back and throw your emotional baggage out of the windows.
It's always a world of trade-off.
Do not trade decisiveness and confidence.
The sucky feeling of "I am a loser", is not the worst thing.
The worst thing is indecisiveness and stupid humility...
There is always another project to do.
There is always another person that will passes by.
You need to get past yourself. That's all