Have Unprotected Sex. Had Urinal And Vaginal Infection. Used Antiseptic Ointments. Stinging Sensation In Vagina. STD?

Question : I am 45, female, did have unprotected sex with unknown man against my will in May, was no trauma made, no immediate symptoms of any disease, but from end of July, all of August - had urinal and vaginal infection, which would not go away with home remedies. Drank a lot of pure water, used antiseptic ointments. It's easier now (mainly I think due to drinking a lot of water, which pushed urine through), but I still feel discomfort in that area, especially after sex. Also even now while having sex I have stinging sensation in my vagina, it stays for sometime after. I do not feel generally week, no nausea, but did have swallen glands few days back and lots of headache. Could it be some form of STD? Where can I check up this problem properly in Kolkata? What would be the cost of complete check up for all STDs?

I don't feel that my urinary infection subsided really, it just that I drink a LOT, so urine pushes through, but there still discomfort and need to go often, sometimes only with small volume of urine.

I have my menstruation regular as usual, 26 days cycle.

so, you think from what I described, it could be syphilis???