Irregular cycles, how far pregnant could I be

So I was on the pill and it stopped my periods I would only have a period 2-3 times a year, my last period was in July, I came off the pill of the 11th September and I never got my withdrawal bleed. 5 weeks later I got a peak ovulation test and we bd around that time, I got a very faint positive pregnancy at 10 dpo I’m now 15 dpo and it’s close to being a dye stealer. I can’t work out how far I could possibly be I got my peak ovulation test on October 12th and on October 23rd I got the very faint positive pregnancy test, can anyone help me try and figure out how far I am, I’ve tried apps and pregnancy calculators but they all ask for last period which I haven’t had, at the moment I’ve tried to go from 5 days after my peak as they say implantation happens from 5 dpo so going from 5 days after my peak makes me 5 weeks today, I will get getting a clearblue digital date one in a few more days but I’m just trying to work it out now.