IUD questions

So I’ve had my iud for about 4 months now and at first I couldn’t feel my strings now I can which scared me but should I?

My boyfriend says he can feel my strings is that a bad thing cuz I might consider them getting cut down?

I’ve had a cyst on my ovaries for about a month now because of my iud should i worry about when it ruptures?

Can my boyfriend release in me with my iud?

Lastly can I have rough sex I feel like I cant enjoy sex the way I had before my iud?