All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad, sallallaahu ‘alayhi wa sallam, is His slave and Messenger.
First of all, you should know that the child dying when his mother was giving birth to him was not necessarily due to you affecting him with evil eye. So, do not worry about this matter and do not let it be your major concern as it may divert your determination from achieving what benefits you in the worldly life and the Hereafter.
We would like to point out for you the two following points:
Also, for more information on how to treat the disease of envy, please refer to Fatwa 86114.
2-Marriage is part of the person' provision, and a Muslim woman will get what Allaah has predestined for her thereof. So, she has to be patient and utilize the available means, such as supplication and looking for a husband and even proposing herself to men who wish to get married. There is nothing wrong with this behavior provided that the relevant regulations are met. For more information, please refer to Fataawa 82471 and 83577.
Allaah Knows best.