I've been having random cramps but it's not time for my period, I've been eating more than usual, and I get dizzy and nauseous, am I pregnant? I also take birth control could it effect the baby if I was pregnant?

Pregnancy cannot be diagnosed by symptoms. You will have to wait to see if your period comes when expected. If not, wait for two weeks, if still no period take a test using first morning urine.

No, taking the pill will not harm your baby if you are pregnant.

It is possible to get pregnant while on birth control, no it will not harm the baby.

The "signs" can be 100s of things, so really no way to tell. You are going to have to just wait to see if you get your period or not, if you miss the period, wait 2 weeks, do test, first thing in morning with first urine of the day