Implantation? Period? Confused.

I have been TTC since January 20th. I had my Mirena removed Jan. 15th. I couldn’t calculate my ovulation because I didn’t have a period at all in the month of January. I started spotting a pinkish watery discharge yesterday, February 17. I was hoping it was implantation but today it’s very heavy and painful. I’ve had a stuffy nose, sore heavy breasts, nausea and going to the bathroom frequently for two weeks before I started bleeding yesterday. My hopes were high that I was pregnant through those symptoms but now I’m very confused. Please help.