Could be prego.. need help?

i have never kept track of my period.. so i cant say if i get my period every 28 days or every 35 or whatever.. but i never skipped a period before and they seem to come pretty much every month like around 30 days.. im 19 , im married, and ihave a 9 month old son.. last day of my period was june 3rd and it stayed for about 5 days maybe 6.. and i still have yet to get it.. when i pms i do get soar and cramps up to 2 weeks or 1 week before my period.. my s are tender throughtolut the day and hurt the worse in the morning.. i was expierencing pretty bad back cramps ( but more in the middle of my back rather than lower) for about 2 days in a row but it has gone away now.. and ive been feeling very tired and eat so much for about .. probably almost 2 to 3 weeks.. could this be pregnancy again! or a skipped period which i never had before.. what the hell would i do with another baby! oh geez