Question: am I pregnant or not?

I am 25, just got married 6 months back.

I always had regular periods and was charting my dates since 2019 April

So, I missed my last period In July.

And this is August my app says I should have my period by 7th but

unfortunately I don’t feel the period coming anytime soon.

Like I always knew by the signs but I am having non.

I did take a pregnancy test last month on the last day of when my period was supposed to end. And it was Negative

( first response)

Details: I was really anxious and couldn’t wait.

I had the home test done that morning around 11. It was definitely not my 1st pee. I was hoping it was positive but it was Negative.

The month Went by casually no signs or symptoms. Just bloating on the first few days, and slight nausea

My husband is getting anxious now to know if we are having a baby or not.

Also, we were not trying to have a baby and always used protection.

He said to me yesterday “you better give me our baby or get your regular period this month”

*I had giggles* he and I are afraid if it’s not a baby is my health okay?

I haven’t been drinking since April after I turned 25.

I haven’t had coffee too.

I don’t smoke,

nor take any sort of Birth control Pills.

I feel very healthy and never had an health issue,

Me and my husband keep talking about babies and We would be more than happy to have one.

I have decided to go see a doctor by end of this week, if my period doesn’t come in 2-3 days.

What doctor should I see ?

What maybe the causes?

How soon should I see a doctor?

Thanks for your help!