D&C/Period/Ovulation

Hi
I don't know what to do.  I had a D&C exactly 4 weeks ago today.  Two weeks after the D&C the hpt were all negative. 
I thought I had ovulated two weeks after the D&C but my gynae said at my two week follow up appointment that it was too early for ovulation.
I was told to expect my approx period 4 weeks after D&C.  I've had very mild cramping and back ache over the last two days, and yesterday there was quite a sufficient amount of watery discharge.  I didn't think anything of it -  Could this have been ovulation (I don't chart/temp)?
Little concerned if it is because hubby and I had sex yesterday🙈 and I haven't had a period since the D&C.  We were told to hold off baking making for two cycles.