I can be a little tough to say without seeing and feeling your razor in person, but I suspect the edge needs to be touched up.

You've been using the same razor for a month, you've nicked the strop twice which means your stropping technique has been less than perfect, and it's starting to pull mid shave.

I would recommend that you pick up a barber hone, pasted strop, or pasted bench hone to touch up your razor from time to time. It's a very small cost, and will keep your razor in shaving shape much longer.