I suppose that you still have a catheter in situ...........or not.
If you have, then there should be rine in your bag and that being blood stained is normal
if the catheter has been removed, then providing you are passing your urine, albeit blood stained.......then no big deal.
Bruising to the glans is not that uncommon depending upon the expertise of your surgeon...;-)
Drink plenty, avoid streuous exercise and monitor the situation and as long as you are passing urine, you will be on the right track.