Hey ladies, so this will be TMI...

I am a bit confused as to what is going on with my body this month.. My husband and I have been ttc for the past 4 years.. This was our first month using preseed.. For the past 5 days I have been spotting on and off.. Ranging from bright res to light pink. Not enough to fill a pad or a tampon. Only when I wipe but after I pee there is a bit of red mixed in with my pee. I am due for af in 5 days.. I have been getting cramps on and off the whole time. Pain in my lower back. Neck hurts and get headaches. As each day passes my boobs/nipples hurt more and more to the point I dread putting on a bra. My body just aches all the way around. I havent tested yet cuz the spotting is still happening and its not passed my af due date. Any advice to what could be going on? Has anyone experienced this before and got a bfp?