Angry, confused and so many questions

Chanel

So I have irregular periods as in they come every other month, on the 21st like clockwork. So missed January, had one February, missed marched. Order some ovulation kits and got it home, and did the math that was suppose to ovulate the first week of the month[4th-10th] so I started testing on the 3rd and there was a faint line and it started fading everyday I’ve tested until today where it was completely gone. But this morning I woke up with spotting which never ever happens. We had sex multiple times on the 20th and 30th of March and the 1st and 5th of April . If I ovulated on the 30th or 1st is there a chance I’m having implantation bleeding? I also had cramping april 3 just on my left ovary. I feel like I’m failing and that it’s not fair I have to jump through hopes and seek help when it seems like everyone else just gets pregnant with zero help. This feels like a uphill battle I will never win. It’s been 5 years,when do we just throw in the fucking towel.