It is highly likely that you are not pregnant because you mentioned that the test was negative. Nipple pain could be attributed to hormonal changes, stress, or even caffeine. However, if you are still concerned, it would be wise to pay attention to your symptoms and periods. 

It is common to be worried about extreme thyroidization of your periods after taking emergency contraception; so, in this case, you are suffering from feeling anxious. Late periods are those that can occur due to stress, hormonal fluctuations or other changes in your body. The feeling of chest tightness and nausea could be associated with anxiety or caused by hormonal changes. You need to watch your condition closely and consider giving yourself peace of mind by using a home pregnancy test. In case if you aren't pregnant yet and symptoms get worse or your period still doesn't come, please contact a healthcare specialist. They will give you tailored advice and ensure that you have timely treatment.

Urinary tract infections often occur when bacteria enter the bladder and vagina. You might feel pain when peeing, experience lower belly pain, and have the urge to pee frequently. It's important to drink plenty of water and avoid holding in your pee. Sometimes, antibiotics are needed to help treat the infection.