Beyond confused 😩does anyone know what could be going on with me?

La

I had a postive opk on cycle day 19 it was definitely postive but not as stong as my usual positive. Ive kept on testing and my lines had gone back to negative but on cycle day 28 i had a very strong positive! And today cycle day 29 i had a very very very faint line on a frer ! What could this mean?