Not sure if implantation happened?

We have been trying to conceive for roughly 4 months now, but he works out of town so doing the deed when we are suppose to is practically impossible. Well, valentines weekend I went to him, we did the deed 3 days in a row, however according to glow my most fertile day was 3 days later. Yesterday I experienced a brown mucousy discharge and a little today as well. I am not due for my period for another week. Could we have conceived?