Advice please x

A

So in November i had a chemical pregnancy, the following month i did not get my period tested and got Bfn! 10 days ago I had a few pains so I did a ovulation test and to my suprise i had a LH surge. We BD for a few days around my time of a positive ovulation and now 10 days after I have had a pinkish discharge, could this be inplantation bleeding? And is it normal to ovulate late after a chemical pregnancy?