1st IVF Cycle, positive pregnancy test but not sure if it’s still fertility drugs

Hello, I’m on the border of being in the December and January group. My first IVF Cycle started in December but egg retrieval and transfer wasn’t until Jan.

I’m 15DPO today and my BETA pregnancy blood test is tomorrow.

I had 10,000 units of pregnyl as a trigger (1/1/18) and then 4 booster shots of 1500 pregnyl (the last being 14/1/18).

I’m getting positive Home tests but not sure wether to believe them! I’m so worried it’s just a false positive from the fertility drugs. The tests aren’t getting any darker, just staying the same. What do you think?