Hope it's the lucky 7 !!

So me and my hubby have been ttc for 7 months now and we are visiting some friends this weekend so I decided I would have a adult beverage last night and it made me so nauseous and sick I couldn't even finish it , then this morning I ate breakfast and got sick again. Iam only 4dpo and still having slight cramps . Could it be really early signs of pregnancy? Or just my body playing tricks on me