Red watery discharge. Copper t inserted?

Hello Drs, I went through a treatment for regular/ heavy flow periods by taking Regestrone for 10 days starting from 15th day of my periods. This treatment went on for 3 months and I got periods on time. This time I'm yet to see how regular my periods would be. Today is my 12th day and all of a sudden I see red watery discharge. 2 days back I had lower abdomen pain as if it was a pain caused by periods. Am I fine? Is this common for women who have copper T inserted? All these kind of problems have started eversince I got copper T 1 yr back. My periods were regular, I never had untimely discharge like what's happening to me now before the copper T was inserted. This small small problems after getting copper t fixed is depressing me a lot. Please suggest. Thank you in advance.