Just wanted some reurance! Do my symptoms sound hopeful?

Everybody is different and from time to time periods that are regular can change due to stress or illness etc. Most woman get cramps and backache before a period as well as nausea> if you are pregnant it's too early to tell you won't get back ache till later in pregnancy and the same with the urge to pee as it's the weight of the baby pressing on your bladder. If you are pregnant you may still have some sort of period as your body still has it's cycle when it's due although it may not be as much but this is only for the next period and then they will stop if your are pregnant. Feeling constipated and bloated could be anything and again doesn't appear in really early pregnancy. just see how you go but try not to worry or get your hopes up as this can all affect your cycle and lead to disappointment, you will get pregnant when you least expect it there is no sure way of getting pregnant either your body will know the right time. good luck !