Spotting

Ok im so frustrated and confused ive been ttc for almost a year now, my period got regular after a cycle of progesteron. This month i was supposed to start on the 1st but it didnt happend after 5 days i did a pregnancy test it was negative, on day 7 i started spotting brown discharge for like 3 days very lil almost nothing. Today on day 20 of my miss period still negative pregnancy test and spotting again light pink does someone had this problem or so