Worried...

Has anyone gotten a positive digital at night and then negative in the early morning? I took a digital last night at 6pm and it said yes! Then I woke up to pee in the middle of the night at 3am and decided to try another and it said no :( I have been getting faint positive lines on the FRER tests for the past few days. Could it be that I’m just testing too much? (This will be my first pregnancy and we have been trying so I’m a little anxious)