Take a deep breath. I won't repeat the advice the others gave you, but it is good advice.
I will say that you've done so much hard work, it seems a shame to give it all up because of a couple of days and something you recognize as likely water weight from extra sodium anyway.
Also, I know you said that you've eaten the same as your boyfriend (husband? Fiance?). I know I used to do that all the time. Considering I'm 5'6" and he's 6'2", that was a bad idea. He can (and needs to) eat more calories than I do. So, if you meant you're eating the same amount as him, you may want to enter that into the nutrition tracker and see where you really are in calories for those days.
BUT, that still shouldn't be 4 lbs in 4 days. That'd be an extra 3500 calories per day.