Hi lela
Just wanted to say I am thinking of you so much and was very much in your shoes 18 months ago and everything has changed for the better for me and I am so sure it will for you too.
I had a sweep and didn't find it paticularly unpleasant or invasive and my midwife was very gentle and made it seem like an everyday occurance (which in all fairness it probably was for her). It wasn't something that I'd particularly looked forward to, but after a few days of latent labour that was going nowhere it did get things started very quickly - although equally some friends who hae also had sweeps with late first babies found it didn't do anything at all as the cervix was not ripe.
Like you I was overdue, hating being so pregnant but also dreading each day which would bring me closer to dreaded labour and a baby that I wasn't sure I could love or even care for. I felt queasy knowing that my baby had and was going to come out one of two ways, but I didn't like the idea of either. In the end my body decided things for me and despite mentally really fighting labour my son was born. I thought I would be hyperventilating with fear and having panic attacks while in labour but I didn't and just felt the strangest calm.
As you know, things didn't go so smoothly for me post-natally with an admittance to a MABU but in hindsight it was wierdly enough probably the best thing to ever happen to me. I received the best care, met some wonderful people and slowly got my confidence back in being helped to care for my son and take steps back to being a stronger and more confident person.
I am sure that you will not go through this, but if there is a very small chance that you do, you know that you can go into a MABU and receive the best help to recover.
Regarding loving your son; it may not happen immediately - babies are funny battered crumpled creatures when they arrive and taking care of them in the early weeks does feel a bit like taking care of an ungrateful tiny drunkard who sleeps, feeds, poops and cries to their own schedule absolutely oblivious to the chaos they create, but it does get better as their personality develops and gain more awareness - and when they start trying to smile back at you 
I do very much love my son now, but it took time. I didn't much like my husband or some friends when I first met them - and they didn't give me stretch marks or stitches.
If it helps the love I feel for my son transcends gender. Although his gender is very much part of who he is, I do not love my son because he is a boy nor do I love him despite his gender. I love him because of all sorts of frivolous and not so frivolous reasons - because he has very, very chubby cheeks, because his eyes are very blue, because he has such a lovely smile, because he has a very sunny personality and loves to hug and snuggle - all the same types of reasons that you fall in love with someone in real life.
If you do want to breastfeed but need medication; in many cases you can continue to breastfeed (I'm still on medication and bf but it's never been an issue).
You will be a great mother and you are one already. Despite your immense suffering you are concerned for the health and wellbeing of your son.
You will get through this xx