I had sex last saturday it was my first time and we did use protection. Yesterday (Wednesday) and today (Thursday) I have been experiencing some light pink discharge but it’s sort of watery at times kind of like it’s comjng from my urine (I have experience a little sting when I use the bathroom since last week but it’s not painful and it doesn’t happen all the time.) I am worried I could be pregnant, I haven’t taken a test yet I don’t know how long I should wait to take one since it could be too early. Also my period is irregular, my last period ended 14/15 days ago and it’s not due for another 14 or so days, I have also had lower back pain but that could be from working out Monday on back. Could I be pregnant? Or could it be an infection?