irregular cycles

so I got off birth control pill in late October and since then my cycles have just gotten longer and longer. my first post pill period was 35 days, then 43 followed by 52 and I'm waiting for this one with negative tests again. cycle day 31 so far. anyone have insight or helpful comments? how long can this go on? before pill my cycles were 30 days on the dot. I was on it for roughly 8 years

I'd just like maybe some advice on how to get it back to normal or get pregnant despite the irregularity of it