Hello and welcome to HCM
Bleeding on the last day of your periods after having sex is normal because sexual stimulation causes the vaginal muscles to contract.
This contraction causes the small amount of blood and debris to be released from the vaginal tract.
Experiencing itching and pain in and around the vagina can be due to both allergy
to the rubber (in condom) and due to infection.
Discontinue the use of that particular condom.
Observe for few days.
If the symptoms do not resolve, visit your gynaecologist for clinical examination and to rule out infection.
Thanks and take care
Dr Shailja P Wahal