Starting to feel like it’s never going to happen??

Getting so disheartened and down that I will never get my second child, I’m 31 and have a 6 year old son, he was quite easy to conceive but now I’ve been trying 16 months for my second and still nothing 😩😩 I’m starting to think it’s never going to happen, meanwhile everyone around me is falling pregnant unexpectedly 😩😩 life can be so cruel sometimes. I’m hoping I’m not the only one to feel like this!! Any advice ladies would be greatly appreciated x