Hay, totally normal yan sa early pregnancy, sis! Ang back pain at nipple soreness ay common symptoms dahil sa hormonal changes and ligament stretching, pero definitely mention it sa OB mo pang, lalo na kung sobrang sakit na talaga, some of us moms found na prenatal vitamins and proper support (like a good maternity pillow) helped a lot with the back pain, at for the nipples, Mama's Choice Nipple Cream is pregnancy-safe and sobrang effective, ginagamit ko pa rin when I was breastfeeding after. As for the cravings, haha, that's just your body asking for what it needs, kaya satisfy mo lang pero balanced pa rin kung kaya, one of my mum friends craved ice cream the whole first trimester pero nag-balance siya with fruits and veggies, hehe!