should I go to the hospital?

this pregnancy has sucked so far! early in the first trimester I had nausea so bad I lost 10 pounds and was hospitalized twice for dehydration. I'm around 17 weeks now and this evening I've had nausea, diarrhea, a very small amount of red spotting (like not even enough to soak onto a pantyliner just a wipe from tp) and cramping on my lower left side. I really don't want to go if it isn't necessary since I have a 1 year old who'll have to come along and it's past her bedtime already but gosh I feel terrible.