Im still really not sure....this is sooo confusing....?

Ok so two days ago i started cramping( which i only usally get when im already on my period) anyways everyone that answered on here said it was just my period coming.......anyway last nite i had intense cramping everyone still said it was still my period coming but it still hasnt come??? What is happening i dont wanna get excited that im pregnant bc we have been ttc for 3 years!!!!! So what do u guys think my other symptoms are, tender nipples, nausea, peeing alot, lower back pain, fluttering in lower stomach...... plz giive me all the info u can thanx