Hello, I would be happy to help you with your question.
If you are sexually active AND are late for your period AND have breast enlargement then certainly you could be pregnant. You need to do a pregnancy
now and again in 1 and 2 weeks to be sure. Once you have more information, please let us know if you need help further clarifying this situation!
I hope this helps. If you have additional questions, please use the Premium service. I am happy to elaborate further. You are welcome ask for "Dr. Tim".