The study that showed possible reverse transcription was in-vitro and with a cancer cell line. The DNA was shown in the nucleus but it was not proven that it was built into the genome.
While these findings are highly alerting and need more research (which seems not to be done, we know the reasons) you should not see it as a fact that you have now changes in your genome. If you convince yourself of that, it might create problems by nocebo effect.
And one more thought: If DNA would be inserted into the genome and then expressed, it should lead to more spike protein production which should activate the immune system to kill this cell. All cells who produce spike protein have to be killed by the immune system. If this always works is another interesting question and I am pretty sure it is not investigated, yet
I see real danger only in case of a silent insertion and I am not sure if that can happen with LINE1 elements.
I think you can relax a bit about your concerns.
But what else could create your problems? It is known that spike proteins stay in the body of vaccinated people for many months (one study spoke of 6 months, I think there was even another one who found them after a full year). They may travel inside exosomes through your body and nobody knows the consequences. But there seem to be ways to get rid of it (book below).
And another problem seems to be generation of autoimmune antibodies. Dreamweavers Auto immune reversal might help in that case.
I think Florian Schilling wrote about both problems in his book “Long-Hauler: Manual for Long-Covid and Post-Vaccine Syndrome”. Maybe you find some answers and solutions in it.
I wrote, I’m sorry about your sister’s situation. That must be hard. Especially for women uterus problems can be the most painful with their periods combined that’s a killer pain. I hope she gets well. All the prayers for her. There is never a time we must stop trying to get healthier and stronger. Stay strong 
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