My baby is 8 months old and STILL wakes every 2 ish hours! Some nights can be good and some days in…

My baby is 8 months old and STILL wakes every 2 ish hours! Some nights can be good and some days in a row he sleep for like 9 hours! But over all he is up a lot! What gives? I have tried sound, solids near bed time, bath, or earlier bed time. If something does work, he adapts and is back to waking up!!! Gosh it is hard. :( I breastfeed so it's a struggle. When did your baby sleep through the night? At least 5 hours!!