I know this is somewhat of an odd question , but I cant seem to find a straight answer

My fiance and I are TTC , and this month I know we hit my fertile time bang on , but anyways , I got what I think was my normal period 2 days early (November 12th) and the color was alot lighter than normal but the amount and flow was relatively the same , it only lasted 5 days which it sometimes lasts up to 8 , so I dont think it was abnormal , but now , I still have severe breast pain , it just feels like someone is constantly squeezing them with all their might and they just ache - and although I dont get nausea during the day too often , almost every night for the last 3 weeks ive been feeling so incredibly nausea at night when I try to go to bed and I get hotflashes and dizzy if I get up to go to the washroom or anything..the other odd thing is my lower back KILLS me at night , i cant even lay down without being in pain and during the day if my breasts hurt my back will start to throb almost insync.....and headaches? I get horrible headaches if ive been out doing things for an extended period of time?.......Anyways im rambling , I just have NO idea if theres even a possibilty being pregnant after getting what I am assuming was my normal period? the last time I tested was on the 15th ( 3 days into my period) and it was negative....so I highly doubt I am , but I dont think these symptoms are all in my head , as much as I hope to be pg......Thanks in advance for all the input , and I guess I will wait and take a home test again tommorow just to try to settle my mind , I will update everyone on the situation