Only 3 supplements? :) I take an excellent multi vitamin that is sourced from nature when possible, vitamin D, vitamin B12 sublingual, omega 3, currently taking iron, and trying out saw palmetto (got it for $1) lol.
As for health, the results of a study published in the American Journal of Clinical Nutrition showed women who took a high potency multi vitamin over a 5 year period were found to lower their risk of a heart attack by 41% compared to women who didn't supplement. Inflammation and oxidation are the enemies when it comes to disease states.
Recommended to avoid synthetic vitamin E - dl-alpha tocopherol.
Check for fillers. Some listed are potentially a health hazard. Eg: yellow number 6.
Calcium supplementation can have negative effects on magnesium levels. Too much calcium is known to cause a magnesium deficiency. Make sure magnesium levels are optimal.
It's not too much -- probably too little for any benefit with the fish oil, and the calcium is probably neither balanced or the proper form. The bigger problem is you're taking poor quality supplements that you probably won't absorb well. Buying supplements at drug stores or Costco is not a good idea. Do some research, and if you have a good small health food store (independent, not a GNC or the like), go and have some chats with the supplement buyer to see what is best out there.