Advice?

Hello ladies, 

So last Monday AF (Aunt Flo - menstruation/period) came about 4 days earlier, started off as spotting for a whole day Tuesday & Wednesday I bled but nothing like a normal period. It was a "medium to low flow" with sometimes small clots or discharge. Thursday morning I "bled" maybe a few mins in the morning by the time I got to work I was no longer bleeding just spotting. Same day around 1ish I bled a little then it stopped and went back to spotting. Af was due that Friday but had been spotting /"bleeding" since Monday. Its been a whole wk and my spotting just stopped yesterday. During this time I was not cramping but I have been extremely emotional (more than usual), and I've have mild headaches. We are TTC (trying to conceive) something just didn't seem normal since I pretty much spotted for an entire wk with only 2 days of a medium flow. Has this happened to anyone and was pregnant? Could it be something else?