hi
welcome to bellybelly
when we first come off any hormonal contraceptive our bodies can take a little while to adjust. your cycle may not go straight back to a 28day. this one might be longer.
it took 6 months for my cycle to get normal again after the pill.
i hope you do get a bfp(big fat positive) really soon. in the meantime jump into one of the ttc threads. lots of great info and great ladies in there.
good luck