I really think you need to go back to your doctors!!
Ive suffered with depression since a week after I got my positive pregnancy test last year and it took me till 3 weeks ago to go and get help from the doctors. I convinced myself I wasn't depressed, would lie on the HV tests because I didn't want them interfering and convinced myself that non of the medications would work. It was coming to the point where it was make or break for me and my other half, I left him one night and then a couple of days before I went to the doctors to get some meds I was very close to walking out on both OH and LO forever, it was watching Long lost family and seeing the women that had had to give up their babies when they had to due to their unfortunate circumstances that gave me the biggest wake up call ever and made me think to myself stop being such a selfish bitch and look after your amazing baby that you've been blessed with and are so lucky to have.
Colic is horrendous and Ive had first hand experience with it after Sophie suffered from it and constipation. My advice to you would be:
If formula feeding change to a comfort milk (I use aptamil comfort and wish Id used it from the beginning)
Buy some doctor browns bottles (they are lifesavers!!! and fit into usual sterilisers so you dont need to buy the doctor browns steriliser as well)
Warm baths with you getting in the bath with baby and skin to skin contact
Have a youtube search of colic massage (definitely works!!)
Moby wraps or any similar baby slings are brilliant for settling baby and give you a break, even if it is to be able to sit on the sofa watching tv and not end up with arm ache!
Whereabouts in yorkshire are you?? If you're close ish to me and havent got a moby wrap Ill happily lend you mine xx