Friday WI dissapointment

I am so ridiculously confused! Last night at 5pm I weighed myself and I was 174.8lbs! Woo! A 1lb loss! This morning at 6am I weighed in as I usually do and the scale said 176.4lbs! What is going on? I thought you were supposed to be lighter in the morning. I guess the beer and wine I drank last night did me in? I am so confused! I hate my scale! I have been exercising like a mad woman, eating relatively okay and then this happens! I guess this is a lesson to only weigh myself once a week and not before my scheduled weigh-in on Friday mornings. I just wish I could start seeing losses on a more regular basis. I know I need to start controlling my water intake better, so maybe that is the next step for me to try. I can say that I am getting more in shape though, which makes what I see on the scale just a number. I feel great and can do things now I never thought before in a million years I could do. Tomorrow I am running my first ever race that is more than a 5k! It is a 4 mile race, so not much more than a 5k, but I am still proud of my ability and especially my desire to do this race!