Onset of menopause. Please advise.

I am a 48 year old single woman and havent been sexually active. I was with someone about 12 years ago but were physically intimate just on a couple of occassions.the first time as expected had the usual bleeding along with some pain. I was recently with someone about 3 weeks ago but he could not penetrate and I started bleeding for about 15 min. There was also a lot of pain (a lot more than the first time). This caused me a lot of embarassment .Is this normal and will I get back to normal again. I seem to have missed my period which was due during these 3 weeks. I have missed my cycle only twice in the last 2 years possibly due to my age.My sexual urges over the last few years have diminished , part of this is probably psychological and partly menopausal. I am worried if I were to be in a relationship again it will not work if I cannot be normal sexually.Please advise.