Why am I getting such low fps with barely anything in my world?

So I’ve been working on this mini survival game for a while now, and ever since I upgraded to 4.18, my game has been lagging for no apparent reason.

As you can see here, this is when I look at the world from within the editor, and I get a smooth 120 fps.

However, when I hit play, and this happens in standalone mode too, I get a very unsatisfying amount of fps considering my PC specs.

My specs are:

Intel core i7-6700k 4 GHZ CPU

gtx 1070 graphics card

16 gigs of ram

Does anyone know how I could fix this and/or what could be wrong?
Thanks in advance

Never mind. I’ve had this problem for so long and deleting everything and putting it back seemed to fix it.