Talk to Urologist on Urologist Related

dear doctors, i was wearing white dress today and suddenly i saw few drops of blood on my trouser. muje nai smj lagi k drops kesy aye because main ny feel nahi kiye. blood he hay ya mera weham but i want to be sure. i have a history of bladder problem like infection , stricture. i have been taking medicine but it was never worse for me. it always a slight problem. i want to do few tests before visiting doctor. please suggest me important tests to make sure nothing serious