Does breastfeeding affect OPK's and BBT?

[OskisMum]

Started doing OPK's and BBT last week, every day the tests show LH and it looked like they peaked on Thursday so I take it that I ov'd on Thurs/Fri.

Even though the lines are getting faint they're still quite dark, is this normal? Or could it be breastfeeding that affecting this?

Also does breastfeeding affect BBT?

Thank you in advance ladies xxx