Im in the same boat.. I have fell on my bum twice in the last two days. Thursday I took DS to a new park and there was a small slide there so I thought I would take him down and but I was expecting to stop at the bottom as my feet would hit the floor first but it went soo fast and was really slippery that I fell about 30cm straight on to my butt. Then yesterday, at the same damn park mind you, DS was playing and then decided to run out right infront of 3 kids swinging really high on swings. I ran for him to grab him before he got wacked in the head and got to him in time but slid straight onto my bum when I grabbed him, so not only was I worried about bub I was embarrassed too lol there was quite a few people there.
I havent had any bleeding or pain but bub has been a little quieter (Maybe its just me thinking things seem quieter not sure). I also have listened to his heart beat and he was beating away... like you said, like a horse lol. He has kicked a bit but I cant help but feel worried too... I have a MW app on Tuesday so I will just keep listening to HB and feeling for movements until then and tell them on Tuesday..
Maybe just give your MW or Dr a call if you dont have an app any time soon and they might want to scan you to make sure bub is ok?
