110mile charity cycle in 4 weeks time...can i manage it?

[Mel.b]

At the start of Feb i ipgraded to a road bike and i signed up for a charity cycle that is taking place on the 7th July. Prior to that, the most i had ridden was 31 miles which was back in August 2011.

In Feb i rode 208miles inc two 31 mile rides. In March i rode 282 miles inc my longest ride at the time of 43 miles. In April then up until the 13th I had ridden 165miles. On the 13th April i fell off my bike and fractured my elbow This meant 6weeks off the bike where i did nothing i started back cycling on the 19th May and on the 27th may i did my longest ever cycle of 50miles, however i had to push up one hill. The following weekend i did another 50mile cycle at an average speed of around 12 - 13 miles per hour (which is my normal speed). There were no major hills on that route so i didn't have to push. All my cycling is done by myself and it is meant to be something that is fun and not a chore.

The charity cycle is 110miles and has 2300metres of climbing (?7500feet...sounds like a lot!!) The most climbing i have done is on the first 50mile cycle i did which had 900m of climbing (2900feet) and i had to push up the one cat 5 climb on that. I cannot underestimate how bad i am at hills - partly due to my weight but also possible exercise induced asthma which i am going to see the doctor about on Friday.

So basically in 4 weeks time i have to be able to cycle more than twice the distance and do more than twice the amount of climbing. I have been told not to worry about the climbs - that they are drags rather than steep hills, but the one i am particulary worried about comes 85miles into the cycle and is 6miles all uphill that's a long way to push if i need to. I'm estimating that the entire cycle will take me 9-10 hrs + stops. From what i have read people who have done it before say the atmosphere is worth at least 30-40miles and that there is always someone to cycle with as approx 5000 people do it.

I'm hoping to do my first 60mile cycle this weekend, but i really just don't know if i have done and will be able to do enough before the date.

Do you think it is realistic that i am going to be able to acheive the cycle? I swing between freaking out and thinking it will be ok (but i think freaking is winning at the moment, hence this post!) If i hadn't broken my elbow and missed 6weeks of training i would be confident, but i'm not now.

Thanks for listening!
Mel