really unsure

hi. i have checked on last thursday, last saturday and also today but all the test was faint lines. i'll be checking with a digital soon but im not sure if going to the doctor this week or next is too early or not. also maybe im overthinking as i had a miscarriage at 18 weeks in may last year. should i go to the doctor to check this week or next week? or wait till the end of the month?