Any insight?

Alright ladies just looking for any insight on anyone's experiences. My cycle is irregular ranging from 28-35 days. Last month my cycle was 35 days and I'm creeping up on that number soon which isn't normal for me having two consecutive months of the same number of days. I am 12dpo and a couple days ago had some light brown spotting. According to glow AF isn't due until Tuesday. I know a hpt is the only way to know 100% but I don't want to test yet. If we're not pregnant this cycle then we're doing IUI. Does my chart or any info show any insight to the possibility of having conceived?TIA