TTC/ Late

I am over a week late on my period but I took one of the cheaper pregnancy tests (because I'm tired of paying over $100 on multiple expensive ones just to get no/:...) but this one came up was negative too I was wondering if it would be a good idea just to give in and get a digital one just to be sure. Me and my Fiancé are wanting a baby so bad it hurts.. We are waiting for our Rainbow baby