Pregnant

I need some help

I've been vomiting for the last 3 days (that's normally my first sign of pregnancy was with my daughter and the baby I lost) I've had the odd light bleed here and there that's been like a pinkish/reddish colour, I've taken test after test and they are all coming back very faint. I've taken one this morning and it's fainter then any of them have been! But I've read that drinking in the night and going for a wee can effect how strong the morning wee is? I drank loads in the night last night and went for a wee a few times! I'd only be roughly close to 3 weeks and haven't had a clear positive yet 😢 is that even possible?