Using withdrawel and had a slip up this weekend...please help!!

[gr8kids]

Our youngest is 11 months old and we been using withdrawel method of contraception. Not trying to fall pregnant again. But we had a slip up over the weekend. And Im sure I was ovulating. I know its pathetically so early but Im feeling dreadful. My boobs ache, my back is sore, feel dizzy and so tired. Could I possibly be pregnant?? If so could I get such early signs especially that its my fourth?? Please can anyone help?? If Im not prego then whats going on?

Well after the slip up Im now convinced Im pregnant. Af is due next wednesday 21 march and today i had a very light pink bleed. My breasts have been hurting and Ive been feeling crap!! We said it it happened that be fine but it wasn't us planning exactly. Can anybody tell me please if they think this is AF come early or implantation bleeding????? Is it too early for pregnancy test? Would a clearblue digital be any good???

first response have always given me reliable early results.

hope you get the result you want.