Irregular periods 😭

Duno what’s up with me got implant out 16th December had my first period 26th January so was a 37 day cycle , second one 24th February so was a 29 day cycle thought that was my period going back to normal ! It’s now 2nd April & am on cycle day number 38 & still no period! pregnancy tests says negative so not pregnant & have no idea when it’s going to start! It’s killing me as we are trying for a baby & have no idea when I am ovulating etc so have no chance of falling pregnant 😭😭 anyone else went through this after coming off birth control ??