Wifi speeds suddenly dropped alot

So i had this Qotom Q570G6 for about 6-7months, its been running nicely.
I bought Qualcomm Atheros QCA9880 and installed myself, its been working great.

This morning wifi speeds dropped to like under 10Mbit in some cases, wife cant work from home etc its that bad.

Is there steps i can take to troubleshoot this, or would you guys think its a physical problem with the antennas or the wifi pci card?

Im using 19.07.5, ye i know theres newer but it works :slight_smile:

edit: "Qotom Q570G6" means its a x86 build

Thanks in advance