3rd cycle after misscarriage?

My first cycle after my d&c was short (23 days after d&c ) no cramps and light..2nd one was heavy way crampy and long (22 days after 1st period )...this period now (37 days from last period) is super werid it's light slight cramps(usually alot of cramps) don't even need a super plus tampon as usual! Plus alot of old blood not to red but someone red here and there... Anyone ever had a lighter period and was pregnant? We're trying still, this period just seems abmormal!