38 weeks pregnant and tantruming toddler - help!

[Thatsnotmyfigure]

My 23mo has turned into a monster and I don't have the patience or energy to deal with him!
He's better when out and about and when around other people. At home with me there's lots of relentless crying when he doesn't get his own way, hitting me, throwing food or toys. Have implemented time out/ naughty step but can't say it's helping!
I don't have family nearby and most friends are away in August or back at work. Am making the effort to still get out each morning also introduce new (secondhand-new) books/ puzzles etc at home
There's a bit of teething going on and people are saying he's probably aware change on the horizon ...?
Any survival ideas appreciated! I daren't even think about how he'll be with a newborn around!

Hi the reason time outs not working is because his receptive language development isn't developed enough for him to understand what it means. It's about 2 1/2 onwards that it starts to be effective.
Unfortuney he is hitting the terrible twos - pushing boundaries, non conformist plus your acting different (less energy ) which is confusing to him. I can barly remember the first 6 months when my second was born as it was quite difficult. It changed quite quickly when the strops subsided.