Ok well your main site like has been said doesn't sell you. It just shows photos. What do you mostly do? What do you want to do? If I have to ask then your website has failed.
Your wedding site's a subdomain, which is generally bad for SEO (given you have a main website) and looks funny to people. The SEO is acceptable, but look at word order - "London Wedding Photography by (you)" may work a little better. Text on home page is good for SEO, but awful for people - it says you're not that good which is why you charge little. The images on the home page aren't great - show your best. Look at my home page for one way to do things.
Your portfolio gallery's awful. The first image isn't good, why would it be bridesmaids? The people buying photography are brides and sometimes grooms, show great photos of the two of them together, photos of family with emotion. Ditch the awful gallery, make it easy for people to see more work - people will scroll down a whole page, but won't click constantly or wait for a stupid slow slideshow.
Your photography, from what little I could be bothered looking at your gallery, is high end amateur standard, professional. Work on your skills in posing, lighting (it doesn't have to be obvious), and capturing emotion and events. Processing needs work too. Avoid the black hole look, try to balance foreground brightness with background brightness better.
Under pricing put "no hidden costs" at the top. Your pricing page is a bit ugly, at least bold the package names. Again you could look at mine. Also offering albums would be a good thing, I have a tutorial here. Albums can be profitable.
Lower end customers tend to be the most demanding and the most difficult to photograph. Starting out's hard.
So my overall advice is improve or replace your website, make it obvious you're a professional for hire and what you specialise in, and work on developing your skills even if it means working cheap or for free.
But to answer your question, yes I have considered giving up given the proliferation of photographers and pricing pressures, and I'm pretty experienced and not bad at photography.