Hi, bit of advice needed. I've been putting my 9 week old to sleep at 7.30 each night, then doing a sleepy top up at 10 when I go to bed (he'd sleep through this if I didn't get him up). He's sleeping until 4/5 then having a gripe (which he resolves with thumb sucking) and dropping back off about 6 until half seven when I get up. My question is, should I be putting him to bed later? How long does he need to sleep, is this too much and would he sleep a full 8 hours if I put him to bed at 10? He does seem to be really tired at 7pm? Any suggestions or carry on as is? Thank you :)