Should I not be feeling this way while im trying to conceive?

I am one of those girls who hates to get their hopes up! I have been experencing somethings such as darkend and they are enlarged, constipation, achy pain bellow my bellyon that wraps around to my lower back. I dont want to sit here and think i am preggo and get my and my hubbys hopes up... Am I the only one? and is it not good for me to think this way???