I'm not sure if I having a period or implantation bleeding. Last month I am trying to conceive and my period cycle is 35-38 days. According to this cycle I got period 1 week early and I have crampings, feeling dizzy and tired. I also have nipple pain. Usually I have heavy flow during my period espically for 2nd and 3 rd day. This time it is very lighter than my usual period . It lasts only for 4 days(my usual period is 6-8 days) and on the 4th day I can see only small spottings. I'm trying for my first baby. Please help me. If I have to take home pregnency test , for an accurate result I have to wait how many days? Please help me.

Sounds like implantation, but again, it is a guess, it could be just a period. Won't know at this point, You could try a HPT in perhaps 10 days and again in another week if that is negative.