I am experiencing inverted nipples, breast tenderness to touch, stretch marks and back pain (side: both) .

Inverted nipples: Nipples come in all shapes and sizes. A doctor can examine you to make sure yours are normal. Breast tenderness can be caused by a variety of things such as hormonal changes, weight changes, diet changes, medications and others. Back pain has a very long list of possible causes. See a doctor for an evaluation. If you think you might be pregnant check then check a home pregnancy test.