Breast tenderness could be due to the water logging post-ovulation. Sore throat
could be seasonal. You can get a blood test
done to be sure about any chance of getting pregnant as HPTs at this stage may not always give a positive result as they are not so sensitive. Ideally, you should wait for your period before taking the next step. If you have failed to conceive after removal of IUD, and that too with difficulty, you should get investigated for secondary infertility
, including uterine condition, patency of the tubes and so on. Please get further advice from your doctor. Good luck.