Pregnant?

I was supposed to have xrays done today but the wouldn't do them with there being a possibility of me being pregnant. Didn't think I was but we never use protection (been together almost 5 years) and we have 1 child. The xray tech agreed if I went next door and bought a home test and showed her I wasn't pregnant she would do them. Great plan except when I took it I saw a very faint line. I'm supposed to start tomorrow so I'm not late and it wasn't my first p of the morning. I feel like I'm going crazy and was just seeing things. So Dr tomorrow for another test. I'm hope its positive but things have been very tight financial wise in our house so the other half def isnt