Reb Chaim Kanievsky zt'l said that when he was seventeen, his father and the Chazon Ish zt'l began looking for a shidduch for him. He ended up marrying the daughter of Reb Eliyashiv zt'l when he was twenty-three, and his kallah was seventeen years old. Reb Chaim said that when he began shidduchim, his bashert was only twelve years old. This story is a reminder that one doesn't have to worry. When the right time arrives, it will be. When a person has emunah and bitachon, he lives a tranquil life, without worries.
When the time came for Yaakov to marry Rochel, Lavan tricked Yaakov Avinu. It states (29:25) לאה הוא והנה בבקר ויהי, "It came to pass in the morning, and behold she was Leah!" But the pasuk doesn't state that Yaakov was angry at Lavan. He complained and asked him why he tricked him, as it states עמך עבדתי ברחל הלא לי עשית זאת מה לבן אל ויאמר רמיתני ולמה, "[Yaakov] said to Lavan, 'What is this that you have done to me? Did I not work with you for Rachel? Why have you deceived me?'" but it doesn't state יעקב אף ויחר בלבן, that he became angry with Lavan. He knew this was from heaven, so why would he become angry?
And indeed, it was from Hashem, and many good things came from it. Yaakov suspected Lavan might switch Rachel, so he gave her simanim. When Leah was taken in her place, Rachel, concerned that Leah would be embarrassed, revealed the simanim to her. Rachel was blessed with children because of this kind, selfless deed, as it states (30:22) את ויפתח אלקים אליה וישמע רחל את אלקים ויזכר רחמה, "Hashem remembered Rachel, and Hashem hearkened to her, and He opened her womb." Rashi writes that Hashem remembered the merit that Rachel gave the simanim to her sister.
Also, when the Yidden went to exile by the churban Beis HaMikdash, they stopped to daven at Rachel's kever (see Yirmiyahu 31:14-16). Rachel davened in heaven, and her tefillos were answered. The Jewish nation was promised that they would yet return to Eretz Yisrael, as it states (Yirmiyahu 31:16) ָבוּׁוְש ָםלִגְבוּל ָנִיםב, "The children shall return to their border."
Metzudas Dovid (Yirmiyahu 31:15) writes, "Hashem told Rachel, 'Now you will be rewarded for your good deed, that you gave the simanim to your sister. Your children will return from enemy land."
Also, the Midrash (Agadah) says, "The Avos and the Imahos went to appease Hakadosh Baruch Hu [to atone for] Menashe's sin that he put an idol in the Beis HaMikdash. Hashem didn't accept their pleas. Rachel came before Hashem and said, "Ribono Shel Olam, who has more compassion, You or human beings? Obviously, Your compassion is greater. Now, behold, I brought in a tzarah (second wife) into my home. Yaakov worked for my father solely for me, and when it was time for my church, they brought in my sister instead. Not only was I silent, but I also gave her the simanim. You should do
