Im confues !!! Please answer !!!

I ovualted on my own on the 28th... I think i did... I took a ovualion kit came back neg this was at 7:00pm but when  I  was messing around with my husband around 10:00pm  i had to go to the bathroom first and when i went to the bathroom I had a very clear and strech discharge but the ovulation kit at 7 came back neg but with the clear discharge made me think i was.. I used the ovulation kit from last month and on the box it tells u to throw away the left overs not to use so now its the 3rd of feb my boobs hurt and feel heavy and under my arm pits hurt but im not due for my period until the 13 which is 10 days from now so i just dont understand what is going on.. Im also cramping alittle.. I would think it would b to early for my boobs to hurt either way... If i ovulated it would have been 7days ago... Any idea ?