I really hope this is okay to post as I don't really know where else I can go with this. I'm a 20F and I've had stomach problems for years - I get these flare ups where all I can do is sit on the toilet and struggle with cramps even if all I'm passing is a mucus like substance. When I was 17, I was hospitalised because I was passing black / bloody liquid and nothing else. At the time I was told it was colitis and given a full colonoscopy (which came back clear) but I was later told by a specialist that it was gastroenteritis and i shouldn't have been given a colonoscopy in the first place. This year, my symptoms got really bad and I had a repeated flare up for a month. Since then, I'm either constipated or passing through the eye of a needle and in pain probablt every single day. I had invasive tests including an ultrasound earlier this month but I'm not due to have an appointment to talk about them until January - I know the NHS is struggling so much at the minute but it's so frustrating because if these results are fine I want to know what else I can do to try and find what's wrong with me.

in addition to this, I have to "help" myself go pretty much everytime and the last few weeks I've noticed that there's a rock hard... thing in what I think is my rectum. It literally feels like solid and won't move from what I've felt of it. I'm so scared. I've been tested for all sorts of allergies (including coeliac as it is in my family) and nothing has come back from that and I feel so on my own. It's so embarrassing that I don't think I can talk to anyone about it, especially because I've only just turned 20 and I've had the issues since I was like 14. I really don't know what my next move should be. Should I go back to my GP? I feel like she'll just hand me back to the specialist she referred me to but they're obviously so busy it might be another couple of months before they'll talk to me about this. 
i feel anxious all the time and I know that you're meant to stay away from google but you can't help yourself can you, and now I've really scared myself with what I've seen. Maybe I just needed to vent or maybe someone has a similar story to mine and I might be able to understand what's happening to me more.

thank you