I'm going to make this short my fiance and I been trying to conceive for years last year I finally was pregnant had a miscarriage but we trying for our rainbow baby ovulated my fertile window started on the 10th we baby dance till I was done ovulating since the 16th I started noticing that my nipples was sore and it got worse I can't touch them I have to wear a bra my period post to come on in 10 days but my nipples are killing me I had heart burn last night and been feeling tired but I haven't been doing anything to feel so tired

What could it be?????