pregnant or just wait to see😔

I have been on the pill for a about 2 and half weeks now and I take it everyday at 6pm at times I forgot to take it a 6 so I will take it either 30 mins later or an hour. But anyways long story short my period is 3 days late and my doctor told me on the last week for the pills that's when I will get my period, but someone also told me it's to early for my cycle to change that fast.  But I have been cramping and ect. Me and my boyfriend have been having sex un protected too. What should I do? Should I be worried!? No judgement