Guys i haven't started yet and I wanted to know if its psychological in a very heavy way, ...

Big big spolers
In few parts it s very heavy
One character was relentlessly bullied for being gay (bratem) and threatned with jumping out of window
Another was molested as kid by a teacher and was beaten by his dad who doesnt care much about him sińce his mom died

Will it make me feel like there is an impending doom in my heart

I also can’t read heavy stuff and it had parts where I thought I will have to stop cause everything is going to shit but it stays quite realistic so I would say give it a try
But as said above it has some sensitive topics

Ty so much, i'll definitely give it a try

Hmm i dont know you so dont know
i think the story is packed with plot development so there s always something more happening distracting you from that other fucked up thing and it is a story somewhat about healing (very słów and not linar)

But if any of the mentioned things trigger you i d advise you against that
Your memtal health is important