OP, women do not operate like men. Their attraction is not as intensely visually oriented as mens' is. An extra 10 pounds is not the first thing she notices, if she even notices. Besides she's likely never met you when you weighed less. Be assured, a woman would not pass up a good man or hot sex because a man happens to be carrying an extra 10 pounds.
How a man makes a woman feel is what cinches the deal for her, or not. How he makes her feel, starts with how he feels about himself. If you feel inadequate or insecure because of 10 pounds, then you'll project that. If you are a man who accepts we all have some ups and downs and are comfortable with yourself through both, you'll radiate that self acceptance. Add in self confidence, strength, fun, and centeredness and pvssies get wet fast.
Your self judgement is just that--yours, not hers. Drop it. Go have fun. Feel free. Enjoy yourself. You are great just how you are! Sure, in a month you'll feel even better. Don't wait till then to have fun with women! Enjoy yourself now! Women are looking for good men now! Enjoy them.