2 weeks late, lots of symptoms but negative hpt, just evap lines..

I'm 2 weeks late, I had a blood test taken last week but it was negative and I've done hpt and they're negative too. I'm having a lot of symptoms which are on track for how far along I should be (5 weeks). I just keep getting very obvious evap lines in the given time frame. Very confused! It took about a week to get a very very faint positive with our daughter so I'm hoping it might be low hcg but unsure. Anyone else had anything like this and turned out to be pregnant?