I need help! Zzz

My baby has the lightest sleep ever!!! He was sleeping through the night 9pm-7:30am for over two weeks (I was the happiest ever) But now, he is waking up again and even more often and earlier than before. I’m dying slowly!!!! I know doctors and some people say to let them cry til they go back to sleep, but for me is not an option, specially at midnight and in a townhouse. What can I do???

Please the moms who their babies are sleeping through the night give me some advise! Most of my friend’s babies are sleeping through the whole night long time ago. I’m the only one in this “shitty lack of sleep?” Thanks.