I have irregular periods but my period normally comes around the end of the month but it hasn't came yet my last sexual intercourse was about 3 weeks ago since then I've been bloated its like it goes up and down. For a couple hours its up and bloated then it goes down then it comes back and so on. I have slightly sore breast clear discharge with no odor lower back pains and stomach cramps every now and then I can't get through a half can of soda without having to use the bathroom I feel faint and nauseous at times and very moody I'm really not sure what to do. Can anybody help.

Normally most women have no signs at all, until they miss their period, this could be a worst period coming on, a infection of some sort , many options.

You will need to wait till your period is 2 week late to attempt a pregnancy test. Always test first thing in the morning as soon as you wake up