Alternating positive then negative pregnancy test

For exactly a week- I’ve had positive and negative pregnancy tests. This has been going on for a week. My doctor won’t order me a blood test. There are lines there and they aren’t faint but they aren’t dark when they are positive. Second morning urine is when I get the positive. The FMU is faint. The rest are negative during day after second urine. All had lines within timeframe

SOS!