Thanks @Dogmum13 that's a bit more reassuring! From the app I used it said I should have been ovulating on CD17, and it came around a lot quicker than I expected so definitely felt we could have DTD more in the run up.
After 8 years on contraceptives I'm not sure how long my cycles typically are! I just had the implant removed and it took 7 weeks for my period to arrive, and so I'm really just learning what is 'regular' for me.
Have you been tracking with ovulation strips or anything similar?