I shore dive; is there any possible way to bring and extra tank with me so i dont have to swim all the way back to shore and set up a new tank?
This is an interesting question, because it presents a whole series of things to think about.
Often the surface swim back is an important part of your surface interval, if you don't have to swim back, are you willing just to sit on the surface so you aren't going into decompression profiles?
Have you planned for your dives for this contingency?
+1 on getting/finding a dive buddy; whether dive club or hanging out at dive shops or on this board is used to find one (or two or ten...) (I am not opposed to solo diving, but I believe a strong foundational base of knowledge, experience and training should be established before participating.)
After all of this, one option for two tanks is a side mount system. (you have to do the research

Good diving.