Implantation or ovulation??

Hi ladies

I’m just after some advice. I’ve just gone back off the pill and we are TTC number 2.
My cycles before were always out of whack, some 28 days, some 38….

AF started 16 Feb. On 5 March I had pain on my lower right side. (I always get ovulation pain, but only for an hour of 2 and I couldn’t remember if it was like that pain or not), then yesterday morning I started getting a funny pain in my lower right again. It has continued off and on since yesterday morning and gotten stronger now. Also yesterday I had a small brown “spot”. In my last preg I had the pain I have at the moment for the first few months (the doc said it as the follicle releasing hormones) but can’t remember it this early… But it may have?
From your experiences, could it be from implantation? Or just ovulation late?

TIA :)