big baby wish...

Hi everyone.

I really want a baby.
I'm 26 now, turning 27 next month.
I've been off the pill for 1.5 years now.
I used to think it would just happen naturally, without me really trying... "that's what I hoped for"...
But nothing could be further from the truth...
I've been doing ovulation tests for a few months now... but no success yet.
Am I doing something wrong? My periods are very irregular.
Since I stopped the pill, I sometimes don't even get my period for months... and since stopping the pill, I've also had super heavy bleeding... at times it felt like it was running down my legs....
In Feb/March I even had my period for almost a month... and last month it was okay again, but because we've been trying so hard, I thought this time 'Bingo!' since it was day 4... tested and NOPE... probably my period just staying away again.
I'm in such a precise phase that I want to give up.. everyone in my friend group is becoming a mom, and it's really not working for me.
I'm looking into different causes, I have some extra weight myself.. could that be it? The gynecologist said if it doesn't improve after a few months, she'd prescribe medication to make my periods more regular, but this is all new... does that work? I've also been taking folic acid for a while, but stopped for a bit since it's not working, but maybe I should start again?
What are your experiences? I'd love to hear it! I need to find the courage to keep going..
Warm regards, Ennii