Stretch marks and weight gain with first Ivf cycle?

This is my first <a href="https://glowing.com/glow-fertility-program">ivf</a> cycle and I’m having my eggs retrieved Monday and I stepped on the scale and I’ve gained a pretty big amount of weight like 10-15 lbs I have been taking it easy but I haven’t been eating to bad and I’m noticing a few stretch marks is it possible it’s water weight? I’ve been bloated with all the medications and I’m starting to worry I plan on starting to be active again after my egg retrieval. I just noticed the stretch marks under my arms today. But I feel bigger too. I just am really worried but hoping I can loose the weight after I get my hormones normal and I feel like me again.