What does this discharge mean?

Hi all, I’ve been TTC for 4/5months, I was previously on the contraceptive injection. I haven’t had much luck conceiving due to not having a period since the injection wore off.

I have just recently got my discharge back however I wiped this morning and this is what I saw...

I have cramps on and off and I did a test yesterday which was negative..any idea what it could be?