Period but pregnant?

Caitlin
I heard that you can still get your period while pregnant. The past few cycles have been lighter but I took a test in May and it was a super strong negative result. I don't have any signs but I was just curious if the result was such a strong negative if I can trust it. I haven't had sex since February so I'm assuming I'd also have a bunch more symptoms by now if I was. But can I trust the test result?