Is it a early pregnancy sign ?

hi guys i was wondering if you can help me. my husband and i have been trying to have a baby since january and we havent had much luck but like a week a go i got this massive sharp pain that would come and go during that day until i went to the bathroom and i had a spotted like brownish redish pinkish stuff and it was only that day and now for like a week already ive been getting these horrible cramp like pains on my left leg i was wondering if those are early signs ive had some nausea here and there and when i do i sorta gag but dont barf (sorry for so much detail ) and i have been having some cravings but i dont wanna get my hopes up please help if you have any info it will be greatly appreciated !!! thanks =D