Ovulation uncertainty

[Sarahegg]

Hello all,

I came off the pill 5 weeks ago to start a family. I had a withdrawal bleed 4 days after but no sign of my period yet. I've had 5 days of cramps which I thought was an indication of my period but nothing as yet! I've taken a pregnancy test but it's negative ?

How will I know if I'm ovulating? I'm aware it could take months for my period to return .

Thank you