Need Help!! This wallet contains a very large number of small unspent inputs. Ignoring some

I have been receiving this message recently with my blockchain wallet ‘This wallet contains a very large number of small unspent inputs. Ignoring some’ when trying to send my bitcoin, please note I only have about a couple bitcoins or so valued around $4000 AUD, however when I am prompted with that message it says it can send the bitcoin minus fee of $3700 AUD, WTF? So from my understanding I have to pay a transaction fee of around $3700 AUD which is the majority of my bitcoin!!!!, that is absolutely appalling, at this point there is nothing I can do with my bitcoin but just look at it, can someone help me understand why this is the case? I have searched google for an explanation and the solution to the problem is a little vague, but it has something to do with receiving micro transactions which I have accumulated from btc gambling and faucet sites. What should I do?