Period early and only lasted a day

So here it is. Me and my husband were trying for almost 2 yrs. I had my period this month, June 2 till the 7th and then got my period/spotting on the 28th of june and today, theres no bleeding whatsoever. We had sex on June 25-28 (yeap, we’re trying) Could it be a sign of implantation bleeding? I never get period twice a month, so this is new to me. And oh, he’s in the military, so we never get a chance to do it for 7 months, and we have a 2 yr old kid.