Terrible twos?

Sooo does anyone elses 18 month old throw the craziest tantrums for almost anything? Whyyyyyyyy must he screeeam lol hes in time out but jeez i feel like it isnt working hes only in time out for like 3-5 minutes and just screamin the whole time. Im also 11 weeks pregnant not sure if that could be a cause but he always wants me to carry him and i dont like doing that too much. Lol just wondering if anyones goin through this also. Not complaining he amazes me on how loud he can get considering he had problems breathin when he was born lol