In the end, Jon wasn't able to do much to stop his period until he had fumbled around with a tampon, which didn't stop it, it just absorbed the blood for the time being. He cleaned himself off as best he could and tossed aside the dirtied tan pants and underwear.
Jon then tried to figure out how he'd get to school. He had wished that his mother would not have to drive him to school. Although his wish about first period had backfired, there wasn't any obvious way for that wish to backfire, short of making him too sick to go to school, which he wasn't. Which meant that he should be able to go out and catch the bus, at least if he hurried and maybe if he didn't.
As long as he wasn't forced to pay for a taxicab. As long as he wasn't turned into a baby who doesn't go to school. As long as the school wasn't blown up by terrorists... okay, there were lots of ways for that wish to backfire.
Jon went back to his room, grabbed some panties, stockings, the pair of blue jeans he had tossed aside, and shoes, and started getting dressed. He probably still had a pair of sneakers somewhere, but it wasn't what was laying around, and he was in a bit of a hurry. At least the jeans, though tight, wasn't a skirt.
Jon grabbed his lunch and books and raced outside. He arrived at the bus stop just as the bus got there. Checking his watch he saw that the bus was around ten minutes late; this wish had decided not to backfire.
Jon sat down alongside Karyn and they made some small talk, while Karyn didn't comment on his new anatomy. Maybe she hadn't noticed? Jon was, after all, trying not to call attention to it, hard as that might be. He didn't want to embarrass himself, but on the other hand he wanted Karyn's advice to deal with it. There was no choice other than to tell her.
"Karyn, I need your help," he whispered. "I used the stone and made a bad mistake."
"Really?" she said. She glanced at Jon's feet, then up to his head. "What did you do?"
He leaned even closer to whisper and said, "I wished I wouldn't have a small penis. So I didn't have any at all. After a couple more wishes I ended up like this...."
"You had a penis?"
Jon groaned. "Wishes change reality. Of course. I should have realized."