4 dpo and not feeling good

i am currently 4 dpo and last night while trying to go to sleep i had very uncomfortable cramps and my sciatic nerve was bothering me(it hurt the whole time in both previous pregnancies) to where my legs ached and i noticed that my whole chest feels like its bruised and i even asked my husband to grab my boobs and asked him if they feel normal a d he told me no there is lumps in them that weren't there before. well this morning i woke up extremely nauseous to the point i actually gag and a stuffy nose and my boobs still hurt. so my question is has anyone experienced this kind of symptoms this early? i dont remember with my other two because they were not tracked.