False positive pregnancy tests, how do you keep your hopes from getting too high?

It had been 5 weeks since my last menses. We have been trying to conceive for 8 months. I had never been particularly irregular and hadn’t had a “late” period yet. One day late and I wasn’t too excited. Two days and I thought sure why not check a test. Clearly negative. Two more days and I thought sure, why not, check another. And that had the faintest lightest little second line. But it was there. I saw it. And my heart soared and a little wave of terror too but mostly joy. And I waited two more days and took a last test and... negative. And today I started my menses and I’m just crushed. I know it hasn’t been a year yet and I really have no right to complain, lots of couples have a much harder time but how do you cope with a false positive? Any thoughts? Any puppy pictures would also be appreciated