vvf line CD35, but now spotting

Im CD35 today. Yesterday afternoon I had this tan discharge and it went away, came back this morning and spotting unusual. No blood just tan discharge. I took a test and this came up, but my tan has turned into pink brownish discharge this evening when I checked (only when checking CP) and I have cramps.... what does this mean? I'll take another one in the morning. This was done after work at 7pm.... I have no other symptoms except my boobs have gotten really big and really sore.