Early sign of pregnancy??

Has anyone started showing potential early signs of pregnancy within the first week?

My boyfriend and I have been TTC for about a month now. I got my period about a week and a half ago (only went for 3 days, which is totally normal for me). As soon as it finished we started TTC again. It’s been about a week now, and today especially I have noticed that I have been extremely irritable, getting cravings to want to eat all the time and VERY bloated almost like I am experiencing PMS! But I know it isn’t because my period JUST happened.

Could it be a potential early sign of pregnancy?

Side note: I have also been taking prenatal vitamins, hoping they will help. Could the vitamins be causing this?