It is too soon to take any sort of test?

hello I am new to this forum but im hoping somebody could give me some advice. I had been off of any sort of birth control for almost 1 year due to being single however over the past couple of months i have began a new relationship. planning ahead (or at least thinking I was being sensible) I went to the docs for a supply of the pill (cilest) and started taking it, however after day one of taking it and a few too many cocktails we ended up getting carried away and having unprotected sex... I am now on day ten of the pill so it is too soon to take any sort of test (i think?!) but I have been having some early pregnancy type symptoms. I have had cramps in my lower abdomen for a few days and my breasts are really tender and sore. I know these are also side effects which can be associated with the pill though so have no idea if I could be pregnant.. although when I have taken  cilest previously I cant remember having any sort of cramping! Im really worried, but if I am pregnant when can I do a test? and should I continue to take the pill meantime or could it harm the potential baby?

Thank you :-)