Thanks for posting your query.
For physical well being it is essential for a person to have an ideal body weight.
It appears that the recent weight that you have gained is causing physical problems for you.
Exessive weight can caiuse back ache.
I would suggest that you start a regime of regular exercise.
It could be walking, jogging or cycling for 40 minutes at least 5 days a week.
Also start a low carbohydrate
low fat diet. Avoid junk food and sweets.
Include lots of fresh vegetables and fruits in your diet.
it would be best if you get a personalized diet plan
to suit your calorie requirements.
The most important thing here is to remain motivated.
Do not give up. You will find that regular exercise and healthy eating also improves the mood.
As for the pregnancy
tests, sometimes exercise and weight loss
by themselves can help in conceiving.
Otherwise you can consult a gynecologist who can assess your hormonal
status and treat you as required.
wishing you good health