Periods following ovarian cyst removal

I had a 10cm ovarian cyst removed in December (without ovary removal), which also included having my copper IUD swapped for a hormonal one. I have recovered well but i’m now on my 2nd period since surgery and my periods have been very different.

I struggled with heavy periods (bleeding through a tampon within 1 or 2 hours) and back pain previously.

Since my surgery my periods have been very light (which is great) but it’s now very dark clotted blood when I wipe rather than a flow going into a tampon or pad. I also have bad sudden cramps which I didn’t have before and mainly just bad back pain.

I want to see if anyone else has experienced this and if it’s just a short term thing or something I should now expect long term?