Pregnant or Paranoid?? 😳🤔😳

So lately I have been feeling sick but knowing me it is either in my head or signs of my period coming up (even though symptoms for my period normally don't start this early). I am sexually active and my boyfriend and I use a condom every time. The one time though the condom did snap (April 15th) and I don't know if he was close to cumming but he pulled out after that and we stopped having sex, at least till the next day. The day the condom snapped was right before my fertile period. I have been having back pain (probably partially due to my scoliosis) but it has been more in my lower back. Cramping which I never experience this early, slight nausea, heartburn, extremely tired lately, kinda have had to pee more but I've also been drinking more water so that is probably why I am peeing more. I haven't missed my period yet and it isn't due for a week but these symptoms at this time are unusual for me. I am probably just being paranoid right? And letting my mind play tricks on me? Any advice, tips, comments would be very helpful! Thanks in advance!