When is your cycle really irregular?

Hi everyone,

We've been trying to get pregnant for a year now. Unfortunately, it hasn't worked out yet...

I've been tracking my cycle the whole time and I notice that I don't always get my period on the same date. Sometimes there's a gap of 4 or 5 days compared to the previous month. Is this considered an irregular cycle or is it normal?

Also, I feel like I have quite a bit of body hair. Especially on my upper thighs, buttocks, and around my nipples... I do have dark hair and very fair skin, so the hair stands out more naturally.

I read an article online about PCOS and I'm worried that I might have it... Are there any women who have similar things or am I just overthinking it?