Late period while trying to conceive

I’m 21 days late and getting negative, my last 2 cycle has been very light, feb was 1 day period and not heavy, march 11th was 3 days and very light, spotted with barely any blood stain and it couldn’t even fill a pant liner on 12march till 14th.

I have on and off PMS or pregnancy symptoms but nothing, most especially sore breast, my stomach is heavily bloated and the scan shows i have lots of gas in my belly. I also added weight

Still hoping for a BFP or period. I am 29 years old and don’t want to think it’s pre- menopause. If I don’t have a baby soon my marriage will be at risk because my mother Inlaw in desperate and ready to send me out by causing me troubles . God please help all TTC moms 🙏