first pregnancy - some nausea, mostly in the mornings, I vomited once
second pregnancy - very severe nausea, never once vomited but gagged all the time, ended up in the hospital several times
third pregnancy - moderate nausea all day, vomited a few times
fourth pregnancy - severe nausea all day, vomited a good number of times
fifth pregnancy - severe nausea all day, vomited more times than I care to remember, was able to deal with it better than earlier pregnancies so never ended up in the hospital although it was by far my worst