Pleas help looking for answers

Ana

I have 2 concerns . I’m 4 weeks pregnant been experiencing Nelly and lower back pain that goes all the way to my leg but no bleeding has shine experience that and ended up having a healthy pregnancy ?

#2 my boobs were swollen now they swell down but my nipple hurt a little bit. Is this normal. ??

Pleas help experience 2 miscarriages already ... hope this one is a viable pregnancy ...