Guys I’m confused and Ik this sounds dumb

So please no mean judgement I’m not stupid but just confused as okay so last month I had a faint pos on a frer but then I got my period the day it was due it was light and only 2 and a half days well anyways I tested again but with a cheapie and I’m pretty sure it was negative (last month )but here i am this month a week late I haven’t tested but is there a chance I could be pregnant from last month ? Also I haven’t had sex since last month as hubs is away sorry not sure where to put this under