Symptoms causing dreading

I should be now 7 weeks. I'm feeling so unbelievably tired! Nausea comes and goes. Even thought of food, turns my stomach. I don't fancy anything to eat. Boobs are stills sore and my stomach is bloated. I would be embracing all this symptoms, if I could now for sure that the pregnancy will continue! Now I just feel miserable. No bleeding so far or signs of miscarriage as yet. Unfortunately, I'm feeling way too hopeful. First scan on Thursday. We'll see what that shows. I'm dreading it.