help please! body changes and don't know if it can mean pregnancy 😳

I got my period 2 weeks ago and I've never been pregnant. My husband and I have tried but have never succeeded. The past weeks I've been dieting with natural supplements and have lost weight. I've had unprotected sex the past two weeks with my husband and today when I woke up I realized that I was really bloated and gassy and I have not been constipated and my period doesn't come until 2 weeks from today. My friend told me to check my nipples and my vaginal lips and I did and they seem to be darker. Also my husband and I have had craving the past days and I've been really tired and have had tender breast and mood swings. Could it be that I'm pregnant? Or can it be something else? I don't wanna get too excited and then my period just comes down because we have tried to conceive but failed. Can anyone help! I need some advice 🙏🏼😞😩