I have been concerned that I might be pregnant I haven't missed my period but I have been really nauseous, tender breathes,white spots around my nipples,head aces, stretch mark. Should I got to see a Dr? Help

If you have not missed a period, then most likely you are not pregnant, ( is it time for period and you had it, or just not time for one yet )

But you may have an infection or flu so seeing your doctor is never wrong