Positive then negative test!

Erica
Okay ladies I need some advice. We have been trying to get pregnant for about two months now. I was super tired and sick for days so I took a test about five days before my period was due and got a very faint positive on a pink dye test. Then I took one yesterday because I should have started my period but I didn't and it was negative! Idk what this means! Should I see my doctor? Could it have been a chemical pregnancy? We really were so happy to see those two lines and now it's heartbreaking to think we could have lost our baby already. I know it's crazy but this is my fourth pregnancy if I am and I swear I am already feeling the flutter. I'm in desperate need of advice or words of wisdom from someone who has been through this! Thanks in advance!