How early can blood test detect pregnancy without symptoms?

So according to this app I’m 3 weeks 0days pregnant. I took a pregnancy test this morning and it’s negative but I’ve been getting symptoms like cramping, back ache, nausea (without throwing up) & bad hot flashes. All these symptoms started this past Saturday. I have a doctors appointment gynocologist on Dec 11th can they tell if I’m pregnant this early by ultrasound? First day of my last period was nov.16

How early can we do the blood test to determine gender? And where do we get it done anyone know?

So, back in December I found out I was pregnant and miscarried in January. I’ve recently started trying to conceive again. I ovulated around May 4th and I’m already having a lot of pregnancy symptoms. I’m 13DPO today and still have had negative home tests. Would a blood test detect it better? My boobs hurt beyond measures, I’ve had heartburn throughout the day and when lying down. Had these symptoms in December when I found out I was pregnant too!

Okay so my doctor took some blood yesterday because the urine test showed negative but I’m still having pregnancy symptoms she told me it was rare to have pregnancy symptoms if tested negative

Is it to early for a positive? My AF is due in 8 days and I’ve been having the weirdest symptoms. Plus I took a test today just outta curiosity and can’t tell if it’s positive or negative. I took this without the flash.

My blood pressure was high as fuck yesterday so they had me come in today to take a early glucose test.. mind you this is the first time my blood pressure has been crazy but pray for me yall I hope I pass 😩😩 lord knows this pregnancy is hard enough without problems I don’t want no problems 😩

Hey mama’s I have a situation I have tested positive 4 times, 2 faint 2 solid. I missed my whole period. I went to the doctors today their test came out negative it was urine, with all my symptoms they said I might be very early, so they rescheduled me for next week. I really want to get a blood test because I know it will detect it but everywhere they don’t let you. You have to get a note from your doctor 🤦🏻‍♀️ I just moved I don’t have a damn doctor my parents never put me in doctor offices unless there’s an emergency or it’s required. Anyone in WNY know where I can go for a blood test as soon as possible? (I have no insurance)