Should I stop trying?

Julie

I’m 39 going to be 40 December 27th my little one is 9 years old and I wasn’t on any birth control all these years but now we’ve been wanting to conceive and my last period was August 19th and I had a blood test last month and it was negative I’ve done several hpt and a few were faint lines but the rest were negative I have tender breast, nausea, fatigue and headaches. Should I just give up? Or is this menopause?