( Then ( ( at ( ( ( 8 weeks ) ( along all ) ) ( of ( the sudden ) ) ) ) ( I ( ( started ( ( bleeding and ) cramping ) ) . ) ) ) )
(ROOT (S (RB Then) (PP (IN at) (NP (NP (CD 8) (NNS weeks)) (ADVP (IN along) (DT all)) (PP (IN of) (NP (DT the) (JJ sudden))))) (NP (PRP I)) (VP (VBD started) (S (VP (VBG bleeding) (CC and) (VBG cramping)))) (. .)))
Then at 8 weeks along all of the sudden I started bleeding and cramping.
(ROOT (S (PP (IN By) (NP (CD 8) (NNS weeks))) (, ,) (NP (DT all) (JJ major) (NNS organs)) (VP (VBP start) (S (VP (VBG developing)))) (. .)))