Someone help me 😩

I am 35 and really really wanted to have a baby so bad...i have regular 28cycles but this month i am 5days delayed.,I let my partner to buy a PT to check it out tomorrow morning if i finally conceive or not but when i woke up after my afternoon nap i found brown spotting on my underwear 💔😢💔 it makes me so sad coz i thought i finally made it since i never delayed in my life..do you think i got delayed period bcoz im getting old? Do i still have a chance.?i dont know what to do anymore i tried all but still not able to be pregnant 😿😿😿