Weight loss during tww

I usually weigh 130-132 lbs. during the tww my weight shot up to 136lbs which made me think I could perhaps be trying to fertilize something. My AF is due 2 days from today  and my weight has dropped back to 130lbs i have never experience weight fluctuations like this before. Is this normal? I have also been cramping a lot and have egg white mucus Anyone esle experience the same?