Long brown periods while trying. Worry?

I had a miscarriage 5 months back and after that i had regular periods for all the following months. Doctor said the results looked fine and I could try again, then last month we were trying to conceive. My last periods was on jan 9th and I used to get periods on or after the same date every month. But this time suddenly i got a gel like discharge with little blood on 6th February. Followed by heavy brown discharge on next day. Then the following day nothing much and in the evening regular periods. This period continued for 3-4 days like usual but then after that there was brown discharge for 3-4 days more. I never had more than 4 - 5 days and sometimes last day might be brown discharge. But this time for 3-4 days more i had brown discharge. Is this something to worry? This is the first time we tried to conceive after miscarriage.