Under your covers, you body begins to undergo the genetic alterations caused by the unspecified serum you spilled on yourself. As your DNA rebuilds itself, your body responds.
The changes start in your feet. They begin to shrink, their structure shifting to become dainty and petite. Any hair present slowly disappears as the skin smoothens and softens. Your calf muscles soften and become less defined while shrinking down you more seamlessly match your feminine feet. Your thighs follow suit with the changes, thickening and losing most muscle definition as well. All of the hair on your legs becomes shorter and shorter until the entirety of your legs are sleek, shapely, and smooth. The alterations continue in your hips. The bones begin widening out, growing to flatter your new legs. Your butt does so as well as it swells and plumps out to fit. Your testicles begin slowly moving inwards as your sac tightens around them. The constricting pressure continues inward until your balls pop inside your crotch and move up into your lower abdomen. Your penis starts its journey as well as it begins to recede into you. It isn't really shortening, but just pushing backwards inside of you. It keeps going until your head is pressed up against your crotch. The head starts morphing into your skin, narrowing and growing vertically along your crotch to form a larger opening. It forms a slit as your skin swells around it to form new lips to complete the outward appearance of your new vagina. The inside cavity the remnants of your receded penis left begins to stretch and change shape as it forms a new vaginal cavity and forms connections with your testicles, which have transitioned into ovaries inside of your body. With your pelvic region and legs fully transformed, the changes continue moving up. One of your ribs dissolves into your body and causes your waist to narrow inwards. Your stomach flattens, losing its hair and turning into a sleek and soft version of itself. The next portion of your body to change is your chest and shoulders. Your shoulder structure begins to move in closer to one another, and your chest begins to grow while all hair vanishes. Two soft mounds of flesh begin pushing out from behind your nipples, causing the covers on your body to start rising. They keep filling out until they would nicely fill a DD cup bra. The nipples atop of your ample new breasts start to expand as well, growing slightly in radius and extending in length until the reach about 1.5 centimeters long when erect. Your arms are next to be affected. They lose a drastic amount of muscle tone and shorten slightly. The structure of them becomes slender and smooth as the hair on them goes away. Your hands turn dainty and petite like your feet, fitting the new aesthetics of your body nicely. The Adam's apple in your throat shrinks until it goes away entirely, leaving you with a new womanly tone of voice. The bone structure of your face morphs and shifts into a beautiful feminine form as any facial hair diminishes. Your lips plump out and your eyes appear a little larger along with your lengthened eyelashes. Your nose becomes small and cute while your eyebrows lose a portion of their hair becoming slender. Your hair follicles start spontaneously and rapidly growing from your scalp. This continues until your new long silky hair reaches down to just around your shoulder blades. The final change to overtake your new female form is your entire body's structure starts to change, adjusting the height of your body until you sit at a moderate 5' 8" stature.
Your new female form still lays asleep under the covers gently breathing. Eventually, morning arrives, and you awaken in your new form.