trying to conceive

I'm 2 days late on my period, I've been trying for 2 years, it took me 4 years to conceive my 1st son! Im having period cramps and really feel like I'm going to come on my period! i have no other symptoms other than a late period, i haven't tested because i just don't want to feel the let down when the tests negative. i keep thinking I've come on but when i check nothing, has anyone else been through this?