Exercise Bike Cycle

Can i use my cycle bike? 33 weeks pregnant?

I’m 33 weeks pregnant and just wondered if it was alright for me to use my indoor cycle bike? I’ve put on quite a bit of weight in my legs and want to do start loosing some of that leg weight now as well as getting a bit fitter, obviously i won’t be dieting or anything, i just eat healthily and want to do some exercises, i can’t get to the pool often so i can’t go swimming and i can’t walk around for long periods of time as i’ve got a bad back due to pregnancy, so the only thing i can see that’s good is using my indoor cycle bike (the ones that you get in the gym). I also won’t be overdoing it, just 10mins a day or so.

What you think? Also, after the birth, do i have to wait until i’ve stopped bleeding before i can exercise properly? e.g. gym type exercises?

If I ride my bike as a cardio exercise, will I loose fat with hula hooping?

I know cycling does burn some calories, but will hula hooping help out with toning my body? I know I have to eat right, drink water, ect.
If not, any advice?

What non-biking exercises can I do to build muscles to help me cycle uphill?

I just returned to mountain biking after a long hiatus and went on a moderate to difficult trail. I was surprised that I did pretty well, but there were a few times I had to get off the bike to walk it uphill – which is hugely embarassing and sucks the confidence right out of me.
In addition to continuing to ride, are there any exercises I can throw in while at home or the office to give strength to the muscles I need to get me up a hill on two wheels?
Thanks!