I have to agree with everyone else here.
The Wizard/Sorcerer combination *only* looks good at second level. After that, it really starts hurting you.
If you continued as straight Wizard, you would be doing 2 magic missiles per spell at third level. Much better than only doing a single missle more times.
You will not qualify for Item Creation feats as quickly, because your caster level is low. You will not be able to pierce SR, and all of your spells will be easily dispelled by enemy spellcasters. The higher level spells are much more powerful, increasing the quantity of low level spells will not make up for this. Think about this: at character level 5 which would you rather play, a Wizard 5 or a Wizard3/Sorcerer2? I know that I would much rather have access to third level spells than a multitude of 1st and a few 2nd level spells.
If you are the only arcane spellcaster in your group, the whole group will suffer if you multiclass. They will be lacking the magical firepower that creatures of your groups' challenge level expect the group to have. They will still have an arcane caster that they have to protect in combat, but the arcane caster can no longer pull out the big spells that a group should have.
If you are not the only arcane caster in the group and you want to multiclass, go fighter or rogue. That way, you have abilities to fall back on when you are out of spells. There are also PrCs that bring these multiclass combinations more in line with the power of other characters. Look at the Spellsword or Arcane Trickster as examples.
I think even with a 14 in Int, you can make a useful wizard. You will have to pump every attribute increase into Int, but long before you get to 17th level you should have found an item that increases your Int. It will be more difficult. You will have less spells and a lower DC than more intelligent wizards, but you will still be able to cast the big spells.