19th exactly 15days after by last period i had sex with my boyfriend,I was not on birth control but he was using condom. I had a brown discharge for 2,3days around the time i was expecting my period this month,again i had an active participation on the 3rd day of the brown discharge, after two days the brown discharge was stopped n i started a clear white discharge,stretchy with no odour as i get every month when im ovulating, n also water discharge some times.....im quite confused whether im ovulating for the next period or im pregnant

"could the brown discharge be an Implantation bleeding?" i dont have any other pregnancy symptoms like loss of apitite,pains, fatigue and any other..symptoms.
could any one give me a correct responce for this problem???