im not sure if it was a mascarriage! help pls!

I cam on my period after 50 days (usually veryregular 28/29 days every month)….I had the most horrendous cramps, so bad I had to go to bed and lie on my tummy with warm heat pads on my tummy.  Ive never experienced such bad pain down below! Felt like very bad cramping and pain actually down there!

I wasn’t bleeding heavily which surprised me as the pain was so bad…..When I wiped myself I saw a piece of tissue (bodily tissue) it was about 2 inches long. I was quite shocked to see this. Ive seen like a “bloody” clot last year in the toilet (which also concerned me but that time I was a week early)  This was like a skin colour colour….it was almost latex, rubbery in the feel of it – and had some blood on it.

I have now come on my period 17 days later from the above situation and I feel this is my “real” period.  Quite an average to heavy flow  and slight niggling cramp that is easy to cope with and not too bad at all – just as im used to.

I had an abortion about 7 years ago.  Would this have affected my fertility? Am I right to assume that piece of tissue was early miscarriage especially as i was 50 days late since the one before  – I was 21 days late.

I was taking some pills called pregabalin to help my problem with a bulging disc. i was in hospital a few weeks before the 'thing' and was on morphine/gas and air, also had some steroid injections to aid the disc problem.  Could this be something to do with it ? I stopped taking the pregabalins a week before this 'thing' happend as i didnt like being so late and i read somewhere that these pills can make you late but even so, why would i get the big tissue thing!??

PLS CAN ANYONE HELP ME ?
Many thanks !