Spotting but no periods. Or anything?

So my periods were about to come around 13-14 june my cycles shift few days ahead almost every month and sometimes be exact on time...but this month I got slight spotting on 9th June but no full bleeding then similar situation on 10th 11th and 12th spotting is of small finger sized but no full bleeding and on 9th and 11th with spotting I saw reddish urine like blood mixed urine ...I'm bit scared ( 1 year ago I got USG done and it showed that I have pcos ) actually I'm 5'5 22 yr old of 75 kgs from past 15 days I'm actively working out in gym and taking diet and lost about 2 kgs ...and I've not been physical with anyone last i did sex was 2 years back and last i did oral sex was 10months ago ( on 6th August 2025) I'm scared as I have 2 males father and brother in family can sperm transfer from there underwear while washing or toilet seat or anything coz I have not been physical with anyone ..what should I do next should I do pregnancy test or anything?? but I assure you no sex done