6 positive and 4 negative

Hello !! Right need some advice .... I did a pregnancy test a phew days ago it came up positive did another one a phew hours later came up negative did another one that night it came up positive... did one last night came up positive did one this morning negative and did one just then and it was positive.... I have spoke to the doctor and he believes that I am pregnant.... the test line is dark and the control line is very faint. Happened on 5 off the positives.