Late period? πŸ€·πŸ»β€β™€οΈ 🚨🚨🚨

So I had my son 5 and a half months ago and iv had I think 2 periods since then and the last period I had was around February 22nd ( well that’s when I think it was I’m not 100%) so I took a test in the 24th and it was negative not even a faint line so I thought I would come on by now and still no period? Is it possible I could of tested to early?